Bug 142430 Available data set should be invisible for dynamic image
Steps to reproduce: 1.New a sample data source and data set with table "PRODUCTLINES" 2.Add a dynamic image, binding with data set 3.Click "Expression Builder" Expected result: Available data set is not listed in Category to avoid user choose it Actual result: Available data set is listed in Category but we didn't support such expression like dataSetRow["image"]
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ImageBuilder.java
ReportItemHandle handle = (ReportItemHandle) inputImage;
		stack.startTrans( Messages.getString( "DesignerActionBarContributor.menu.element.editDataBinding" ) ); 
		DataBindingDialog dialog = new DataBindingDialog( PlatformUI.getWorkbench( )
				.getDisplay( )
				.getActiveShell( ),
				handle );
		if ( dialog.open( ) == Dialog.OK )
		{
			stack.commit( );
		}
		else
		{
			stack.rollback( );
		}
	}
	private java.util.List unionDataSets( )
	{
		dataSetList = new ArrayList( inputDataSetList );
		if ( inputImage == null || inputImage.getDataSet( ) == null )
		{
			return dataSetList;
		}
		int i = inputDataSetList.indexOf( inputImage.getDataSet( ) );
		if ( i == -1 )
		{
			dataSetList.add( inputImage.getDataSet( ) );
		}
		return dataSetList;
	}
}