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
/**
	 * Sets the model input.
	 * 
	 * @param input
	 */
	public void setInput( Object input )
	{
		Assert.isTrue( input instanceof ImageHandle );
		inputImage = (ImageHandle) input;
		if ( DesignChoiceConstants.IMAGE_REF_TYPE_NONE.equals( inputImage.getSource( ) ) )
		{
			setOKLabel( DLG_INSERT_BUTTON_MSG );
		}
	}
	protected boolean initDialog( )
	{
		if ( DesignChoiceConstants.IMAGE_REF_TYPE_EMBED.equals( inputImage.getSource( ) ) )
		{
			embedded.setSelection( true );
			switchTo( EMBEDDED_TYPE );
		}
		else if ( DesignChoiceConstants.IMAGE_REF_TYPE_EXPR.equals( inputImage.getSource( ) ) )
		{
			dynamic.setSelection( true );
			switchTo( BLOB_TYPE );
		}
		else if ( DesignChoiceConstants.IMAGE_REF_TYPE_FILE.equals( inputImage.getSource( ) ) )
		{
			resource.setSelection( true );
			switchTo( FILE_TYPE );