Improve translation script

  It now loads all available translation catalogs.
Implement empty options sheet
Implement a debug option to show the options sheet in a form window on startup.

  Useful for rapid prototyping as it doesn't require to open the
  Options evertime something changes
Implement options for displaying random images between song titles.

   This includes changes that add a little bit more flexibility
   creating new UI elements by relative positioning
Implement showing images between song titles
Implement possibility to continue a quiz from the last position
Update german translation.
Improve overall experience by refining and fixing the workflow

   Fix not showing images if the option is disabled
   Prevent advancing to the next track if the current ends.
   Only save current playlist position if the quiz window is closed.
   Only indicate quiz end if the next track is tried to be played.
Add ability to package and publish localized releases.
Bump version to 1.2 and add german release package.
Update Readme.md for version 1.2