rename paintroid to pocket paint in visible strings
fixed replacing fail, license restored
added sleep to fill tool test
reset changes in perspective
reset wrong string rename
Merge pull request #97 from Catrobat/pocket_paint

Pocket paint
implementation: [SG] @galstc05
acceptance: [MS] @schmidiM
Merge branch 'master' into 8.94_canvas_size_to_screen_size