Notification that the selection of configuration(s) in some project in the current working set
	 * configuration has changed. I accordingly update the visuals of the working-set configuration to
	 * indicate whether it is active or not.
Notification that the selection of configuration(s) in some project in the current working set
	 * configuration has changed. I accordingly update the visuals of the working-set configuration to
	 * indicate whether it is active or not. | WorkingSetConfigsController.java