Bug 131484 Can't not add item by click the item from palette
Details: Can't not add item Setp: 1.New a report design and open the palette. 2.Click the lable icon. 3.Move the mouse to layout and click again to add the label. Actual result: Nothing is added in layout.
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java
}
	private Object getDataPage( )
	{
		if ( dataPage == null || dataPage.isDisposed( ) )
		{
			dataPage = new ReportMultiBookPage( );
		}
		return dataPage;
	}
	private Object getOutlinePage( )
	{
		if ( outlinePage == null || outlinePage.isDisposed( ) )
		{
			outlinePage = new ReportMultiBookPage( );
		}
		return outlinePage;
	}
	private Object getPalettePage( )
	{
		if ( fPalettePage == null || fPalettePage.isDisposed( ) )
		{
			fPalettePage = new ReportMultiBookPage( );
		}
		return fPalettePage;
	}
	private void updatePaletteView( IFormPage activePageInstance )
	{
		if ( fPalettePage == null )
		{
			return;