Handles selection of working sets and their configurations. Among potentially other actions, this
	 * injects the working-set configuration selection into the project configurations controller and updates
	 * the enablement of the buttons.
Handles selection of working sets and their configurations. Among potentially other actions, this
	 * injects the working-set configuration selection into the project configurations controller and updates
	 * the enablement of the buttons. | WorkingSetConfigsController.java