Dijit not cleaning up after itself

[Bryan Forbes]

When you call destroy() or destroyRecursive() on a widget, it calls dijit.util.manager.remove on its id to free up memory, but the code isn't really removing the widget from the registry. As a test, open a dijit test, destroy one of the widgets and try running dijit.byId("widgets_id"). The problem is the code for dijit.util.manager.remove:

	this.remove = function(id){
		// summary
		//	Removes a widget from the registry by id, but does not destroy the widget

		delete registry.id;
	}

This should be:

	this.remove = function(id){
		// summary
		//	Removes a widget from the registry by id, but does not destroy the widget

		delete registry[id];
	}

[Adam Peller]

(In [9114]) Fixes #3413. Thanks, Bryan for catching this.