Merge Novel Layouts (#837)

* Merge novel layouts and simplify the Tokenizer class
* Fix core tests
* Delete auto-layout code
* Remove no longer needed item layouts
* Remove references to deleted item layouts in test
* Make some minor changes to Tokenizer class and update tests
* Update test reference files
* Update sample project
* Fix a few issues with the Tokenizer
* Centre some text in the sample documents
* Make some minor changes to how new projects are generated
* Add support for New Page and VSpace commands to the Tokenizer
* Remove Title and Page layouts and add codes for page break and vertical space
* Add document layout and fix some issues in index class with new title formats
* Update tests and reference files
* Bump the project file version and fix a minor issue in items class
* Update tests and test coverage
* Clean up some warnings and issues in tests

tests/minimal/content/8c659a11cd429.nwd

@@ -1,5 +1,5 @@
 %%~name: New Scene
 %%~path: a6d311a93600a/8c659a11cd429
-%%~kind: NOVEL/SCENE
+%%~kind: NOVEL/DOCUMENT
 ### New Scene
 

tests/minimal/content/a35baf2e93843.nwd

@@ -1,6 +1,6 @@
 %%~name: Title Page
 %%~path: a508bb932959c/a35baf2e93843
-%%~kind: NOVEL/TITLE
-# Minimal
+%%~kind: NOVEL/DOCUMENT
+#! Minimal
 
-By Jane Doe, John Doh
+>> By Jane Doe, John Doh <<

tests/minimal/content/f5ab3e30151e1.nwd

@@ -1,5 +1,5 @@
 %%~name: New Chapter
 %%~path: a6d311a93600a/f5ab3e30151e1
-%%~kind: NOVEL/CHAPTER
+%%~kind: NOVEL/DOCUMENT
 ## New Chapter
 

tests/minimal/nwProject.nwx

@@ -1,13 +1,13 @@
 <?xml version='1.0' encoding='utf-8'?>
-<novelWriterXML appVersion="1.0b5" hexVersion="0x010000b5" fileVersion="1.2" timeStamp="2020-10-24 18:55:14">
+<novelWriterXML appVersion="1.5-alpha0" hexVersion="0x010500a0" fileVersion="1.3" timeStamp="2021-08-02 17:47:26">
   <project>
     <name>Test Minimal</name>
     <title>Minimal</title>
     <author>Jane Doe</author>
     <author>John Doh</author>
-    <saveCount>3</saveCount>
-    <autoCount>1</autoCount>
-    <editTime>33</editTime>
+    <saveCount>9</saveCount>
+    <autoCount>2</autoCount>
+    <editTime>113</editTime>
   </project>
   <settings>
     <doBackup>True</doBackup>
@@ -47,7 +47,7 @@
       <type>ROOT</type>
       <class>NOVEL</class>
       <status>New</status>
-      <expanded>False</expanded>
+      <expanded>True</expanded>
     </item>
     <item handle="a35baf2e93843" order="0" parent="a508bb932959c">
       <name>Title Page</name>
@@ -55,7 +55,7 @@
       <class>NOVEL</class>
       <status>New</status>
       <exported>True</exported>
-      <layout>TITLE</layout>
+      <layout>DOCUMENT</layout>
       <charCount>28</charCount>
       <wordCount>6</wordCount>
       <paraCount>1</paraCount>
@@ -66,7 +66,7 @@
       <type>FOLDER</type>
       <class>NOVEL</class>
       <status>New</status>
-      <expanded>False</expanded>
+      <expanded>True</expanded>
     </item>
     <item handle="f5ab3e30151e1" order="0" parent="a6d311a93600a">
       <name>New Chapter</name>
@@ -74,7 +74,7 @@
       <class>NOVEL</class>
       <status>New</status>
       <exported>True</exported>
-      <layout>CHAPTER</layout>
+      <layout>DOCUMENT</layout>
       <charCount>11</charCount>
       <wordCount>2</wordCount>
       <paraCount>0</paraCount>
@@ -86,7 +86,7 @@
       <class>NOVEL</class>
       <status>New</status>
       <exported>True</exported>
-      <layout>SCENE</layout>
+      <layout>DOCUMENT</layout>
       <charCount>9</charCount>
       <wordCount>2</wordCount>
       <paraCount>0</paraCount>