Bug 142144 [Smoke][regression]Style cannot be modified and applied.
Description: Style cannot be modified and applied. Steps to reproduce: 1. New a style. 2. Edit it in StyleBuilder and click OK 3. Insert a label, right click and apply the style. Result: After step2, Style name already exist, please chosse a different name. In step3, The created style is gray.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/actions/MenuUpdateAction.java
{
	private MenuManager menu;
	private List actionItems;
	/**
	 * Dynamic items should subclass this action. Menu action(subclass of
	 * MenuUpdateAction) will update this item.
	 */
	public static abstract class DynamicItemAction extends Action
	{
		protected DynamicItemAction( )
		{
		}
		protected DynamicItemAction( String text )
		{
			super( text );
		}
		protected DynamicItemAction( String text, int style )
		{
			super( text, style );
		}
		private ISelection selection;
		/**
		 * Sets the current selection.
		 *