Comment 6 for bug 1247661

Some resources:
- discussion how to trap click event on dock: http://stackoverflow.com/questions/3767559/trap-click-event-on-dock-icon-using-qt-on-mac
- code that should implement trapping click event: https://github.com/KDAB/Charm/blob/master/Charm/MacApplication.mm
- handling apple events: http://doc.qt.digia.com/qq/qq12-mac-events.html
- http://stackoverflow.com/questions/15331854/qt-resize-event-for-docks
- http://qt-project.org/doc/qt-4.8/qevent.html