Bug 29914 Icons for "Sync with Editor", "Collapse All"
We currently have no colored (hover) icon for the "Sync with Editor" and "Collapse All" actions. Also there is not disabled icon for the "Sync with Editor" action.
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/navigator/MainActionGroup.java
openGroup.fillActionBars(actionBars);
		refactorGroup.fillActionBars(actionBars);
		workingSetGroup.fillActionBars(actionBars);
		sortAndFilterGroup.fillActionBars(actionBars);
		workspaceGroup.fillActionBars(actionBars);
		
		IToolBarManager toolBar = actionBars.getToolBarManager();
		
		toolBar.add(new Separator());
		toolBar.add(collapseAllAction);		
	}
	
	/**
	 * Updates the actions which were added to the action bars,
	 * delegating to the subgroups as necessary.
	 */
	public void updateActionBars() {
		IStructuredSelection selection =
			(IStructuredSelection) getContext().getSelection();
		propertyDialogAction.setEnabled(selection.size() == 1);
		addBookmarkAction.selectionChanged(selection);
		addTaskAction.selectionChanged(selection);		
		
		gotoGroup.updateActionBars();
		openGroup.updateActionBars();
		refactorGroup.updateActionBars();
		workingSetGroup.updateActionBars();
		sortAndFilterGroup.updateActionBars();
		workspaceGroup.updateActionBars();
	}