sumatraInitialize: Set useful Sumatra PDF Viewer default settings
Description
Set useful Sumatra PDF Viewer default settings. This will likely only work on windows.
At the given path with "SumatraPDF.exe", this creates two settings files.
Existing files are renamed ("_old_n" appended), not overwritten.
Creates "sumatrapdfrestrict.ini" with SavePreferences = 1 and FullscreenAccess = 1.
Creates "SumatraPDF-settings.txt" with ShowToc = false and DefaultDisplayMode = single page.
UiLanguage gets filled in by Sumatra itself upon first opening.