Window title bar is a "dead zone" - there is no NSView<X11Window> objects there,

so it's possible, for example, to open a menu and move window (and menu bar will not receive
correct event and will "fell through" its main window.
Fix this - override -sendEvent: method for QuartzWindow and check if mouse event is "inside" titlebar.


git-svn-id: http://root.cern.ch/svn/root/trunk@43938 27541ba8-7e3a-0410-8455-c3a389f83636