Bug 134216 [regression] add a report item to library does not work properly
steps to reproduce: - create a library - add report items, say label - add 1st label - add 2nd laebl expected behavior: - everytime i drag a label to Outline->ReportItems, the label will be added actual behavior: - for the 1st label, it worked out fine - for the 2nd label, i had to drag a label twice to complete the operation note that this happened with other report items as well
UI/org.eclipse.birt.report.designer.ui.lib/src/org/eclipse/birt/report/designer/internal/lib/views/outline/dnd/LibraryDropListener.java
supportList.add( IReportElementConstants.REPORT_ELEMENT_TABLE );
		supportList.add( IReportElementConstants.REPORT_ELEMENT_LIST );
		supportList.add( IReportElementConstants.REPORT_ELEMENT_IMAGE );
		supportList.add( IReportElementConstants.REPORT_ELEMENT_TEXTDATA );
		List exts = ExtensionPointManager.getInstance( )
				.getExtendedElementPoints( );
		if ( exts != null )
		{
			for ( Iterator itor = exts.iterator( ); itor.hasNext( ); )
			{
				ExtendedElementUIPoint point = (ExtendedElementUIPoint) itor
						.next( );
				if ( point != null )
				{
					supportList.add( GuiExtensionManager
							.getExtendedPalletTemplateName( point ) );
				}
			}
		}
	}
	/**
	 * @param viewer
	 */
	public LibraryDropListener( TreeViewer viewer )
	{
		super( viewer );
	}
	/*
	 * (non-Javadoc)
	 *