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
import java.util.Map;
import org.eclipse.birt.report.designer.internal.ui.editors.parts.AbstractMultiPageLayoutEditor;
import org.eclipse.birt.report.designer.internal.ui.util.UIUtil;
import org.eclipse.birt.report.designer.internal.ui.views.ILibraryProvider;
import org.eclipse.birt.report.designer.nls.Messages;
import org.eclipse.core.resources.IFile;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.part.IContributedContentsView;
import org.eclipse.ui.part.IPage;
import org.eclipse.ui.part.MessagePage;
import org.eclipse.ui.part.PageBook;
import org.eclipse.ui.part.PageBookView;
/**
 * Attribute view shows the attributes of the selected control. If no control is
 * selected, it will show no attributes and a sentence describing there is
 * nothing to show for the selected object.
 * </p>
 * Multi-selection of control of the same type will normally show the same UI as
 * if only one control was selected. Some of the values may be gray or blank if
 * the selected controls have different attributes. If the controls have
 * different type, nothing will be shown in the attributes view.
 * </P>
 * 
 * 
 */
public class LibraryExplorerView extends PageBookView
{
	/**