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
displayText.append( ") " ); 
					displayText.append( method.getReturnType( ) );
				}
				return displayText.toString( );
			}
			return ALL;
		}
		else if ( element instanceof String )
		{
			return (String) element;
		}
		else if ( element instanceof Operator )
		{
			return ( (Operator) element ).symbol;
		}
		else if ( element instanceof DesignElementHandle )
		{
			return ( (DesignElementHandle) element ).getName( );
		}
		else if ( element instanceof DataSetItemModel )
		{
			return ( (DataSetItemModel) element ).getName( );
		}
		return element.toString( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.designer.ui.dialogs.IExpressionProvider#getTooltipText(java.lang.Object)
	 */