Torn-off menu's title

Torn-off menus do not set their window title propertly (shown application execuable name instead of menu title).

This bug is due to following line in "src/gui/widgets/qmenu.cpp" in constructor of class "QTornOffMenu(QMenu *p)":
setWindowTitle(p->windowTitle()); /// line no 119 in version 4.6.2

This assumes that menu's have a property "window title", but such property is usually not set (especially while creating forms from QtDesigner).

Obviously this line in "qmenu.cpp" should be:
setWindowTitle(p->title().remove("&"));