Drawers: can touch docked drawers (in addition to the content) to close an open drawer (closes #685)
Drawers: simplified last commit, hitArea is used as a fallback if no children are touched (similar to Scroller)
List, GroupedList: selection cleared on data provider change, similar to scroll position being reset to 0,0 (closes #695)
List, GroupedList: updated docs to warn about scroll position resets and selection clearing on data provider change