removed hardcoded Ok/Cancel Buttons
adapted UiTests
fixed nullPointerException in UploadProjectDialog
adapted test
changed test back
fixed button without code
fixed OverwriteRenameDialog error
removed commented-out code
Merge remote-tracking branch 'origin/master' into refactorDialogs
removed unused method
Merge pull request #180 from Catrobat/refactorDialogs

Refactor dialogs
--> There will be a separate ticket for the LoginRegisterDialog