Added SH_Widget_Animate in QStyle

Added SH_Widget_Animate in QStyle styleHint, and use it to determine
whether widgets should be animated or not.

In this patch QTabBar, QColumnView,QTreeView and QWidgetAnimator are
patched to obey the new Hint.

Change-Id: Iefdbddc52c7843f6653dbfb5462125942489b4d9
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>