Update the Inno Setup installer script to change compression method and fix some warnings and issues

setup/win_setup_embed.iss

@@ -1,5 +1,4 @@
-; Script generated by the Inno Setup Script Wizard.
-; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!
+; Script for building setup.exe installer with Inno Setup
 
 #define nwAppDir "%%dir%%\dist"
 #define nwAppName "novelWriter"
@@ -18,6 +17,7 @@ AppPublisherURL={#nwAppURL}
 AppSupportURL={#nwAppURL}
 AppUpdatesURL={#nwAppURL}
 SetupIconFile=setup\icons\novelwriter.ico
+UninstallDisplayIcon={app}\novelwriter.ico
 DefaultDirName={autopf}\{#nwAppName}
 LicenseFile=setup\iss_license.txt
 DisableProgramGroupPage=yes
@@ -25,10 +25,10 @@ UsedUserAreasWarning=no
 PrivilegesRequiredOverridesAllowed=dialog
 OutputDir={#nwAppDir}
 OutputBaseFilename=novelwriter-{#nwAppVersion}-amd64-setup
-Compression=lzma
+Compression=zip
 SolidCompression=yes
 WizardStyle=modern
-ArchitecturesInstallIn64BitMode=x64
+ArchitecturesInstallIn64BitMode=x64compatible
 ChangesAssociations=yes
 
 [Languages]
@@ -36,11 +36,14 @@ Name: "english"; MessagesFile: "compiler:Default.isl"
 
 [Tasks]
 Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked
-Name: "quicklaunchicon"; Description: "{cm:CreateQuickLaunchIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked; OnlyBelowVersion: 6.1; Check: not IsAdminInstallMode
+Name: "quicklaunchicon"; Description: "{cm:CreateQuickLaunchIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked; Check: not IsAdminInstallMode
 
 [InstallDelete]
 Type: filesandordirs; Name: "{app}\novelwriter\*"
 
+[UninstallDelete]
+Type: filesandordirs; Name: "{app}\novelwriter\*"
+
 [Files]
 Source: "{#nwAppDir}\novelWriter\*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs createallsubdirs