Avoid using deprecated document.popupNode
Issue 7237 (Provide mouse position in getContextMenuItems() method)
http://code.google.com/p/fbug/issues/detail?id=7237
Issue 5677 (Color and image context menu items are missing when infotips
are turned off)
http://code.google.com/p/fbug/issues/detail?id=5677
Merge remote-tracking branch 'origin/master' into jsd2
Replaced Css.isImageRule() by Css.isImageProperty() (related to issue
5677)