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
/**
	 * Runs the default action (open file) by delegating the open group.
	 */
	public void runDefaultAction(IStructuredSelection selection) {
		openGroup.runDefaultAction(selection);
	}
	
	/**
 	 * Handles a key pressed event by invoking the appropriate action,
 	 * delegating to the subgroups as necessary.
 	 */
	public void handleKeyPressed(KeyEvent event) {
		refactorGroup.handleKeyPressed(event);
	}
	
	/**
	 * Extends the superclass implementation to dispose the subgroups.
	 */
	public void dispose() {
		gotoGroup.dispose();
		openGroup.dispose();
		refactorGroup.dispose();
		workingSetGroup.dispose();
		sortAndFilterGroup.dispose();
		workspaceGroup.dispose();
		super.dispose();
	}
}