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
updateButtons( );
			}
		} );
		Composite innerComp = new Composite( inputArea, SWT.NONE );
		innerComp.setLayoutData( new GridData( GridData.HORIZONTAL_ALIGN_END ) );
		if ( selectedType == BLOB_TYPE )
		{
			innerComp.setLayout( new GridLayout( 3, false ) );
			title.setText( Messages.getString( "ImageBuilder.Label.EnterExpr" ) ); 
		}
		else
		{
			innerComp.setLayout( new GridLayout( 2, false ) );
			title.setText( DLG_ENTER_URI_LABEL );
		}
		Button inputButton = new Button( innerComp, SWT.PUSH );
		inputButton.setText( Messages.getString( "ImageBuilder.Label.Open" ) ); 
		inputButton.setLayoutData( new GridData( GridData.HORIZONTAL_ALIGN_END ) );
		inputButton.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent event )
			{
				openExpression( );
			}
		} );
		if ( selectedType == BLOB_TYPE )
		{
			bindingButton = new Button( innerComp, SWT.PUSH );
			bindingButton.setText( Messages.getString( "ImageBuilder.Label.Binding" ) ); 
			bindingButton.setLayoutData( new GridData( GridData.HORIZONTAL_ALIGN_END ) );
			bindingButton.addSelectionListener( new SelectionAdapter( ) {