Auto register ScreenLegacy widget.
Disabel scale/rotate/translate for legacy relative layout.
fix bug in unregister_from_filename()
add auto_indent feature
* add shorten_at_end to fix shorten issue
* add kvsandbox
Added collide_point check to Slider.set_value_pos. Fixes issue with Slider inside of a scroll view.
* test reversed event stack
Revert "* test reversed event stack"

This reverts commit 462787edd56f0cb864d3a77e66fe49490e189f97.