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
* Configures the tree viewer.
	 */
	protected void configTreeViewer( )
	{
		ViewsTreeProvider provider = new LibraryExplorerProvider( );
		treeViewer.setContentProvider( provider );
		treeViewer.setLabelProvider( provider );
		refreshRoot( );
		
		int ops = DND.DROP_COPY;
		Transfer[] transfers = new Transfer[]{TemplateTransfer.getInstance( )};
		treeViewer.addDragSupport( ops, transfers, new LibraryDragListener(
				treeViewer ) );
		treeViewer.getControl( ).addKeyListener( new KeyListener( ) {
			public void keyPressed( KeyEvent e )
			{
			}
			public void keyReleased( KeyEvent e )
			{
				if ( e.keyCode == SWT.F5 )
				{
					treeViewer.refresh( );
				}
			}
		} );
	}
	/**
	 * Initializes the data view page.
	 */
	protected void initPage( )