Bug 154814 Use library, add library, delete library selection can't be found on Library right click menu in Library explorer
Details: Use library, add library, delete library selection can't be found on Library right click menu in Library explorer Step: 1.New a library and publish to resource folder. 2.New a report design and open library explorer. 3.Right click on the library in library explorer to use the library. Actual result: The selection of use, add ,delete library cannot be found. Exception result: Do can use the right click menu to use, add, delete library.
UI/org.eclipse.birt.report.designer.ui.lib.explorer/src/org/eclipse/birt/report/designer/ui/lib/explorer/action/AddSelectedLibToCurrentReportDesignAction.java
{
	private StructuredViewer viewer;
	private static final String ACTION_TEXT = Messages.getString( "UseLibraryAction.Text" ); 
	public AddSelectedLibToCurrentReportDesignAction( StructuredViewer viewer )
	{
		super( ACTION_TEXT );
		this.viewer = viewer;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.action.Action#isEnabled()
	 */