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/ExpressionProvider.java
* (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.designer.ui.dialogs.IExpressionProvider#getCategory()
	 */
	public Object[] getCategory( )
	{
		ArrayList categoryList = new ArrayList( 5 );
		if ( dataSetList != null && !dataSetList.isEmpty( ) )
		{
			categoryList.add( DATASETS );
		}
		if ( !moduleHandle.getAllParameters( ).isEmpty( ) )
		{
			categoryList.add( PARAMETERS );
		}
		categoryList.add( NATIVE_OBJECTS );
		categoryList.add( BIRT_OBJECTS );
		categoryList.add( OPERATORS );
		Object[] category = categoryList.toArray( );
		if ( filterList != null && !filterList.isEmpty( ) )
		{
			for ( Iterator iter = filterList.iterator( ); iter.hasNext( ); )
			{
				Object obj = iter.next( );
				if ( obj instanceof ExpressionFilter )
				{
					category = ( (ExpressionFilter) obj ).filter( null,
							category );
				}
			}