Bug 124430 [Smoke][Regression][RCP]Library explorer keep gray even you add library file in Preferences.
Description: Library explorer keep gray even you add library file in Preferences. Steps to reproduce: 1. New several library files and add them through Window-->Preferences menu. 2. New a report and open Library Explorer view. Expected result: Library files display inside it. Actual result: It is gray with nothing inside. I cannot find add button in Library Explorer to add a library file,either.
UI/org.eclipse.birt.report.designer.ui.lib.explorer/src/org/eclipse/birt/report/designer/ui/lib/explorer/LibraryExplorerView.java
{
		LibraryExplorerTreeViewPage page;
		if ( fileAdapter != null
				&& pageMap.containsKey( ( (IFile) fileAdapter ).getProject( ) ) )
		{
			page = (LibraryExplorerTreeViewPage) pageMap.get( ( (IFile) fileAdapter ).getProject( ) );
		}
		else
		{
			page = new LibraryExplorerTreeViewPage( );
			ILibraryProvider provider = (ILibraryProvider) editor.getAdapter( ILibraryProvider.class );
			if ( provider != null )
			{
				page.setLibraryProvider( provider );
				if ( fileAdapter != null )
				{
					pageMap.put( ( (IFile) fileAdapter ).getProject( ), page );
				}
			}
		}
		return page;
	}
	/**
	 * Destroys a page in the pagebook for a particular part. This page was
	 * returned as a result from <code>doCreatePage</code>.
	 * 
	 * @param part
	 *            the input part
	 * @param pageRecord
	 *            a page record for the part