Bug 63351 [Navigator] Import/ExportResourcesAction not removed as listeners of selection service
Open and closing the navigator view, these actions are leaked. It would appear that the dispose for these actions is not getting called?
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/navigator/MainActionGroup.java
TreeViewer treeView = navigator.getViewer(); 
		Shell shell = treeView.getControl().getShell();
		workingSetGroup = new WorkingSetFilterActionGroup(shell, workingSetUpdater);
		workingSetGroup.setWorkingSet(navigator.getWorkingSet());
		sortAndFilterGroup = new SortAndFilterActionGroup(navigator);
		workspaceGroup = new WorkspaceActionGroup(navigator);
	}
	
	/**
	 * Extends the superclass implementation to set the context in the subgroups.
	 */
	public void setContext(ActionContext context) {
		super.setContext(context);
		gotoGroup.setContext(context);
		openGroup.setContext(context);
		refactorGroup.setContext(context);
		sortAndFilterGroup.setContext(context);
		workspaceGroup.setContext(context);
	}
	
	/**
	 * Fills the context menu with the actions contained in this group
	 * and its subgroups.
	 * 
	 * @param menu the context menu
	 */
	public void fillContextMenu(IMenuManager menu) {
		IStructuredSelection selection =
			(IStructuredSelection) getContext().getSelection();
		boolean onlyFilesSelected =