add test for converting points from Screen to layer
add test for converting points from Screen to layer

koenbok/Framer,awt2542/Framer,koenbok/Framer,mattsjohnston/Framer,mattsjohnston/Framer,koenbok/Framer,awt2542/Framer,awt2542/Framer,mattsjohnston/Framer,awt2542/Framer,koenbok/Framer