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
* @param selection
		 *            The new selection.
		 */
		public void setSelection( ISelection selection )
		{
			this.selection = selection;
		}
		/**
		 * Gets the current selection.
		 * 
		 * @return The current selection.
		 */
		protected ISelection getSelection( )
		{
			return selection;
		}
	}
	/**
	 * @param part
	 */
	public MenuUpdateAction( IWorkbenchPart part )
	{
		super( part );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.ui.actions.WorkbenchPartAction#calculateEnabled()
	 */
	protected boolean calculateEnabled( )