Changes made to bug 462606

Who	When	What	Removed	Added
mistria	2015-03-20 09:39:19 EDT	CC		mistria
		Hardware	PC	All
		Summary	project explorer working set top level elements not working	[Project Explorer] When switching top-level to working-sets and no working-set is enabled, show the "Select Working Set" dialog
		OS	Mac OS X	All
		Severity	critical	enhancement