List refactoring: remove the scrolling container, fix #270
Remove all scrollableNode and d-list-container references
List.css cleanup (overflow-x, ...)
Fix selected item persistance when focusing/unfocusing
fix wrongly committed import
prepare for 0.5.0-alpha
Combobox: remove CSS which became obsolete now that the fix of #270 (an evolution of #341) has been pushed
Select: proper handling of form resetting. Refs #365
fix jshint errors