Bug 154828 Item from library contant user properties can't delete
Details: Item from library contant user properties can't delete Step: 1.New a library. 2.Add a label and add a user properites. 3.Public the library. 4.New a report design and use the library 5.Drop the label from library explorer into layout. 6.Try to delete it. Actual result: The label from library contant user properties can't be delete. Exception reuslt: The label can be delete.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/ContentCommand.java
ContentRecord addRecord;
		if ( newPos == -1 )
		{
			addRecord = new ContentRecord( module, element, slotID, content,
					true );
		}
		else
		{
			addRecord = new ContentRecord( module, element, slotID, content,
					newPos );
		}
		ActivityStack stack = getActivityStack( );
		stack.startTrans( addRecord.getLabel( ) );
		try
		{
			
			TemplateCommand cmd = new TemplateCommand( module, element );
			cmd.checkAdd( content, slotID );
			
			stack.execute( addRecord );
			
			
			addElementNames( content );
			
			
			if ( content instanceof GroupElement )
			{
				String name = module.getUniqueName( content );
				setGroupName( content, stack, name );
			}