added black border around both arrows to make them better visible before bright background
removed back button ingame for android, because therefore the softkey is available and the game screen should be as empty as possible
made disabled buttons semi transparent, made sure that disabled buttons can not be pressed
minor refactoring of PlayerProfile
when the player is called default, wants to display a highscore, updates its name and presses ok, the onscreenkeyboar is now hidden
added help to level chooser screen, made layout of level chooser screen more generic
merge
now Tutorial is completed is shown for finished Tutorials and Level is completed for finished levels