--add m_waitingDockViews which are waiting
for removal confirmation. Using destroyedChanged
signal from containments in order to support
the behavior
--improve freeEdges code based on
the docksCount implementation
--corona should load its layout after the activities
consumer is ready. Otherwise all the functionality
concerning activities may not work correctly on its
first initialization
--expose quit action
--hide remove action when only one dock exists
--udpate edges when a new dock is added
--connect the destroyed event of containment in order
to remove also the dockview
--remove correctly the dockviews in the application
exit