Code and GUI text cleanup (#926)

* Move int range checkers from options class to common file
* Improve error handling and reporting
* Make some minor improvements to init and test suite
* Fix 'trypewriter' to 'typewriter' typo
* Remove menu path description in dialog help text
* Improve the help text for entries in the Format menu
* Reword a couple of dialog messages

i18n/nw_en_US.ts

@@ -3253,7 +3253,7 @@
     </message>
     <message>
         <location filename="../novelwriter/dialogs/preferences.py" line="788"/>
-        <source>Also improves trypewriter scrolling for short documents.</source>
+        <source>Also improves typewriter scrolling for short documents.</source>
         <translation></translation>
     </message>
     <message>
@@ -4610,17 +4610,17 @@
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="788"/>
-        <source>Cannot backup project because no backup path is set. Please set a valid backup location in Tools &gt; Preferences.</source>
+        <source>Cannot backup project because no backup path is set. Please set a valid backup location in Preferences.</source>
         <translation></translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="795"/>
-        <source>Cannot backup project because no project name is set. Please set a Working Title in Project &gt; Project Settings.</source>
+        <source>Cannot backup project because no project name is set. Please set a Working Title in Project Settings.</source>
         <translation></translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="802"/>
-        <source>Cannot backup project because the backup path does not exist. Please set a valid backup location in Tools &gt; Preferences.</source>
+        <source>Cannot backup project because the backup path does not exist. Please set a valid backup location in Preferences.</source>
         <translation></translation>
     </message>
     <message>
@@ -4630,7 +4630,7 @@
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="821"/>
-        <source>Cannot backup project because the backup path is within the project folder to be backed up. Please choose a different backup path in Tools &gt; Preferences.</source>
+        <source>Cannot backup project because the backup path is within the project folder to be backed up. Please choose a different backup path in Preferences.</source>
         <translation></translation>
     </message>
     <message>

i18n/nw_fr.ts

@@ -3253,7 +3253,7 @@
     </message>
     <message>
         <location filename="../novelwriter/dialogs/preferences.py" line="788"/>
-        <source>Also improves trypewriter scrolling for short documents.</source>
+        <source>Also improves typewriter scrolling for short documents.</source>
         <translation>Améliore également le défilement machine à écrire pour les documents courts.</translation>
     </message>
     <message>
@@ -4610,18 +4610,18 @@
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="788"/>
-        <source>Cannot backup project because no backup path is set. Please set a valid backup location in Tools &gt; Preferences.</source>
-        <translation>Il est impossible de sauvegarder le projet car aucun emplacement de sauvegarde n&apos;a été défini. Veuillez en définir un dans Outils &gt; Préférences.</translation>
+        <source>Cannot backup project because no backup path is set. Please set a valid backup location in Preferences.</source>
+        <translation>Il est impossible de sauvegarder le projet car aucun emplacement de sauvegarde n&apos;a été défini. Veuillez en définir un dans Préférences.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="795"/>
-        <source>Cannot backup project because no project name is set. Please set a Working Title in Project &gt; Project Settings.</source>
-        <translation>Il est impossible de sauvegarder le projet car il n&apos;a pas reçu de nom. Veuillez définir un titre de travail dans Projet &gt; Caractéristiques du projet.</translation>
+        <source>Cannot backup project because no project name is set. Please set a Working Title in Project Settings.</source>
+        <translation>Il est impossible de sauvegarder le projet car il n&apos;a pas reçu de nom. Veuillez définir un titre de travail dans Caractéristiques du projet.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="802"/>
-        <source>Cannot backup project because the backup path does not exist. Please set a valid backup location in Tools &gt; Preferences.</source>
-        <translation>Il est impossible de sauvegarder le projet car l&apos;emplacement de sauvegarde défini n&apos;existe pas. Veuillez définir un emplacement correct dans Outils &gt; Préférences.</translation>
+        <source>Cannot backup project because the backup path does not exist. Please set a valid backup location in Preferences.</source>
+        <translation>Il est impossible de sauvegarder le projet car l&apos;emplacement de sauvegarde défini n&apos;existe pas. Veuillez définir un emplacement correct dans Préférences.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="815"/>
@@ -4630,8 +4630,8 @@
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="821"/>
-        <source>Cannot backup project because the backup path is within the project folder to be backed up. Please choose a different backup path in Tools &gt; Preferences.</source>
-        <translation>La sauvegarde du projet est impossible car l&apos;emplacement défini est situé dans le dossier à sauvegarder. Veuillez définir un autre répertoire de sauvegarde dans Outils &gt; Préférences.</translation>
+        <source>Cannot backup project because the backup path is within the project folder to be backed up. Please choose a different backup path in Preferences.</source>
+        <translation>La sauvegarde du projet est impossible car l&apos;emplacement défini est situé dans le dossier à sauvegarder. Veuillez définir un autre répertoire de sauvegarde dans Préférences.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="828"/>

i18n/nw_nb_NO.ts

@@ -3253,7 +3253,7 @@
     </message>
     <message>
         <location filename="../novelwriter/dialogs/preferences.py" line="788"/>
-        <source>Also improves trypewriter scrolling for short documents.</source>
+        <source>Also improves typewriter scrolling for short documents.</source>
         <translation>Forbedrer funksjonen til skrivemaskin-rulling.</translation>
     </message>
     <message>
@@ -4605,18 +4605,18 @@
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="788"/>
-        <source>Cannot backup project because no backup path is set. Please set a valid backup location in Tools &gt; Preferences.</source>
-        <translation>Kan ikke ta sikkerhetskopi av prosjektet da ingen filbane er satt. Du må først sette en filbane i Verktøy &gt; Innstillinger.</translation>
+        <source>Cannot backup project because no backup path is set. Please set a valid backup location in Preferences.</source>
+        <translation>Kan ikke ta sikkerhetskopi av prosjektet da ingen filbane er satt. Du må først sette en filbane i Innstillinger.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="795"/>
-        <source>Cannot backup project because no project name is set. Please set a Working Title in Project &gt; Project Settings.</source>
-        <translation>Kan ikke ta sikkerhetskopi av prosjektet da ingen arbeidstittel er satt. Du må først sette en arbeidstittel i Prosjekt &gt; Prosjektinnstillinger.</translation>
+        <source>Cannot backup project because no project name is set. Please set a Working Title in Project Settings.</source>
+        <translation>Kan ikke ta sikkerhetskopi av prosjektet da ingen arbeidstittel er satt. Du må først sette en arbeidstittel i Prosjektinnstillinger.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="802"/>
-        <source>Cannot backup project because the backup path does not exist. Please set a valid backup location in Tools &gt; Preferences.</source>
-        <translation>Kan ikke ta sikkerhetskopi av prosjektet da filbane ikke finnes. Du må sette en ny filbane i Verktøy &gt; Innstillinger.</translation>
+        <source>Cannot backup project because the backup path does not exist. Please set a valid backup location in Preferences.</source>
+        <translation>Kan ikke ta sikkerhetskopi av prosjektet da filbane ikke finnes. Du må sette en ny filbane i Innstillinger.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="815"/>
@@ -4625,8 +4625,8 @@
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="821"/>
-        <source>Cannot backup project because the backup path is within the project folder to be backed up. Please choose a different backup path in Tools &gt; Preferences.</source>
-        <translation>Kan ikke ta sikkerhetskopi av prosjektet da filbanen er inne i prosjektmappen. Du må sette en ny filbane i Verktøy &gt; Innstillinger.</translation>
+        <source>Cannot backup project because the backup path is within the project folder to be backed up. Please choose a different backup path in Preferences.</source>
+        <translation>Kan ikke ta sikkerhetskopi av prosjektet da filbanen er inne i prosjektmappen. Du må sette en ny filbane i Innstillinger.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="828"/>

i18n/nw_pt.ts

@@ -3228,7 +3228,7 @@
     </message>
     <message>
         <location filename="../novelwriter/dialogs/preferences.py" line="788"/>
-        <source>Also improves trypewriter scrolling for short documents.</source>
+        <source>Also improves typewriter scrolling for short documents.</source>
         <translation>Também melhora a rolagem de máquina de escrever em documentos curtos.</translation>
     </message>
     <message>
@@ -4580,18 +4580,18 @@
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="788"/>
-        <source>Cannot backup project because no backup path is set. Please set a valid backup location in Tools &gt; Preferences.</source>
-        <translation>Não foi possível realizar uma cópia de segurança do projeto porquê o caminho das cópias de segurança não foi definido. Por favor, defina um caminho válido para as cópias de segurança em Ferramentas &gt; Preferências.</translation>
+        <source>Cannot backup project because no backup path is set. Please set a valid backup location in Preferences.</source>
+        <translation>Não foi possível realizar uma cópia de segurança do projeto porquê o caminho das cópias de segurança não foi definido. Por favor, defina um caminho válido para as cópias de segurança em Preferências.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="795"/>
-        <source>Cannot backup project because no project name is set. Please set a Working Title in Project &gt; Project Settings.</source>
-        <translation>Não foi possível realizar a cópia de segurança do projeto porque o nome do projeto não está definido. Por favor defina o Nome do Projeto em Projeto &gt; Configurações do Projeto.</translation>
+        <source>Cannot backup project because no project name is set. Please set a Working Title in Project Settings.</source>
+        <translation>Não foi possível realizar a cópia de segurança do projeto porque o nome do projeto não está definido. Por favor defina o Nome do Projeto em Configurações do Projeto.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="802"/>
-        <source>Cannot backup project because the backup path does not exist. Please set a valid backup location in Tools &gt; Preferences.</source>
-        <translation>Não foi possível realizar a cópia de segurança do projeto porque o caminho das cópias de segurança não exite. Por favor, defina um cainho válido para as cópias de segurança em Ferramentas &gt; Preferências.</translation>
+        <source>Cannot backup project because the backup path does not exist. Please set a valid backup location in Preferences.</source>
+        <translation>Não foi possível realizar a cópia de segurança do projeto porque o caminho das cópias de segurança não exite. Por favor, defina um cainho válido para as cópias de segurança em Preferências.</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="815"/>
@@ -4600,7 +4600,7 @@
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="821"/>
-        <source>Cannot backup project because the backup path is within the project folder to be backed up. Please choose a different backup path in Tools &gt; Preferences.</source>
+        <source>Cannot backup project because the backup path is within the project folder to be backed up. Please choose a different backup path in Preferences.</source>
         <translation>Não foi possível realizar a cópia de segurança do projeto porque o caminho das cópias de segurança está em um caminho dentro do diretório do projeto. Por favor, escolha um caminho diferente para as cópias de segurança em Ferramentas&gt; Preferências.</translation>
     </message>
     <message>

i18n/nw_zh_CN.ts

@@ -3253,7 +3253,7 @@
     </message>
     <message>
         <location filename="../novelwriter/dialogs/preferences.py" line="788"/>
-        <source>Also improves trypewriter scrolling for short documents.</source>
+        <source>Also improves typewriter scrolling for short documents.</source>
         <translation>还为短文档改进了打字机滚动。</translation>
     </message>
     <message>
@@ -4616,18 +4616,18 @@
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="788"/>
-        <source>Cannot backup project because no backup path is set. Please set a valid backup location in Tools &gt; Preferences.</source>
-        <translation>由于未设置备份路径，无法备份项目。 请在工具 &gt; 首选项中设置一个有效的备份位置。</translation>
+        <source>Cannot backup project because no backup path is set. Please set a valid backup location in Preferences.</source>
+        <translation>由于未设置备份路径，无法备份项目。 首选项中设置一个有效的备份位置。</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="795"/>
-        <source>Cannot backup project because no project name is set. Please set a Working Title in Project &gt; Project Settings.</source>
-        <translation>由于未设置项目名，无法备份项目。 请在项目 &gt; 项目设置中设置一个工作标题。</translation>
+        <source>Cannot backup project because no project name is set. Please set a Working Title in Project Settings.</source>
+        <translation>由于未设置项目名，无法备份项目。 项目设置中设置一个工作标题。</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="802"/>
-        <source>Cannot backup project because the backup path does not exist. Please set a valid backup location in Tools &gt; Preferences.</source>
-        <translation>无法备份项目，因为备份路径不存在。 请在工具 &gt; 首选项中设置一个有效的备份位置。</translation>
+        <source>Cannot backup project because the backup path does not exist. Please set a valid backup location in Preferences.</source>
+        <translation>无法备份项目，因为备份路径不存在。 首选项中设置一个有效的备份位置。</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="815"/>
@@ -4636,8 +4636,8 @@
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="821"/>
-        <source>Cannot backup project because the backup path is within the project folder to be backed up. Please choose a different backup path in Tools &gt; Preferences.</source>
-        <translation>无法备份项目，因为备份路径在要备份的项目文件夹内。 请在工具 &gt; 首选项中选择不同的备份路径。</translation>
+        <source>Cannot backup project because the backup path is within the project folder to be backed up. Please choose a different backup path in Preferences.</source>
+        <translation>无法备份项目，因为备份路径在要备份的项目文件夹内。 首选项中选择不同的备份路径。</translation>
     </message>
     <message>
         <location filename="../novelwriter/core/project.py" line="828"/>