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
{
			clearPreview( );
		}
		updateButtons( );
	}
	private void updateButtons( )
	{
		boolean complete = false;
		switch ( selectedType )
		{
			case BLOB_TYPE :
				complete = !StringUtil.isBlank( uriEditor.getText( ) );
				previewButton.setEnabled( false );
				if ( SessionHandleAdapter.getInstance( )
						.getReportDesignHandle( )
						.getVisibleDataSets( )
						.isEmpty( ) )
				{
					bindingButton.setEnabled( false );
				}
				else
				{
					bindingButton.setEnabled( true );
				}
				break;
			case URI_TYPE :
				complete = !StringUtil.isBlank( uriEditor.getText( ) );
				previewButton.setEnabled( complete );
				break;
			case EMBEDDED_TYPE :