Bug 113938 Report is marked dirty when open/close cascading parameter dialog without doing any operation on it
description: Report is marked dirty when open/close cascading parameter dialog without doing any operation on it steps to reproduce: 1.new a cascading parameter group 2.save the reprot 3.double click the cascading parameter to bring out edit box 4.click OK to close edit box actual result: Report has been marked dirty expected result: No dirty marked for that no operations done in edit parameter dialog
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/CascadingParametersDialog.java
{
			style = FormatBuilder.DATETIME;
		}
		else
		{
			style = FormatBuilder.NUMBER;
		}
		FormatBuilder formatBuilder = new FormatBuilder( style );
		formatBuilder.setInputFormat( formatCategroy, formatPattern );
		
		if ( formatBuilder.open( ) == OK )
		{
			formatCategroy = getCategroy( (String) formatBuilder.getResult( ) );
			formatPattern = getPattern( (String) formatBuilder.getResult( ) );
			updateFormatField( );
		}
	}
	private void updateFormatField( )
	{
		String displayFormat;
		IChoiceSet choiceSet = getFormatChoiceSet( getSelectedDataType( ) );
		if ( choiceSet == null )
		{
			displayFormat = DesignEngine.getMetaDataDictionary( )
					.getChoiceSet( DesignChoiceConstants.CHOICE_STRING_FORMAT_TYPE )
					.findChoice( DesignChoiceConstants.STRING_FORMAT_TYPE_UNFORMATTED )
					.getDisplayName( );
		}
		else
		{