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/LibraryExplorerTreeViewPage.java
{
		createContextMenus( );
		treeViewer.setSorter( new ItemSorter( ) );
		treeViewer.getTree( ).addMouseTrackListener( new MouseTrackAdapter( ) {
			public void mouseHover( MouseEvent event )
			{
				Widget widget = event.widget;
				if ( widget == treeViewer.getTree( ) )
				{
					Point pt = new Point( event.x, event.y );
					TreeItem item = treeViewer.getTree( ).getItem( pt );
					treeViewer.getTree( ).setToolTipText( getTooltip( item ) );
				}
			}
		} );
		
		IEclipsePreferences rootNode = (IEclipsePreferences) Platform
				.getPreferencesService( ).getRootNode( ).node(
						InstanceScope.SCOPE );
		final String reportName = ReportPlugin.getDefault( ).getBundle( )
				.getSymbolicName( );
		try
		{
			if ( rootNode.nodeExists( reportName ) )
			{
				reportPreferenceNode = (IEclipsePreferences) rootNode
						.node( reportName );
				reportPreferenceNode.addPreferenceChangeListener( this );
			}
		}