Bug 131258 NewOdaDataSet is created when drop dataset from data explorer into layout in library
Details: NewOdaDataSet is created when drop dataset from data explorer into layout in library Setp: 1.New a library 2.Create a datasource and dataset 3.Drop dataset from Actual result: A new dataset named NewOdaDataSet is created. Exception result: The dataset is unnecessary to be created
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/palette/BasePaletteFactory.java
*/
		public boolean preHandleMouseUp( )
		{
			CreateRequest request = getRequest( );
			DesignElementHandle desginElementHandle = getDesignElementHandle( );
			dataSetList = DEUtil.getDataSetList( desginElementHandle );
			if ( IReportElementConstants.REPORT_ELEMENT_IMAGE.equalsIgnoreCase( (String) request.getNewObjectType( ) ) )
			{
				
				ImageBuilder dialog = new ImageBuilder( UIUtil.getDefaultShell( ),
						ImageBuilder.DLG_TITLE_NEW,
						dataSetList );
				if ( Window.OK == dialog.open( ) )
				{
					setModel( dialog.getResult( ) );
					
					
					return super.preHandleMouseUp( );
				}
			}
			return false;
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.designer.internal.ui.editors.schematic.tools.AbstractToolHandleExtends#preHandleMouseDown()
		 */
		public boolean preHandleMouseDown( )
		{