* Allow 'isTouching' and 'pick' to still work on invisible drawables.
* Always ignore visibility for isTouching on drawable
* Filter invisble drawbles in isTouchingDrawable per rules of collision
* polish up some docs/get logic 👍
* leftover line from deleted comment
* revert to ghosted pick behavior
* Add clientSpaceToScratchBounds method
* fix lint
* add some pick tests