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
{
						ElementRefValue item = (ElementRefValue) valueList
								.get( i );
						if ( item.isResolved( ) )
						{
							try
							{
								
								
								PropertyCommand cmd = new PropertyCommand(
										module, element );
								cmd.removeItem( (ElementPropertyDefn) propDefn,
										item.getElement( ) );
							}
							catch ( SemanticException e )
							{
								assert false;
							}
						}
					}
				}
			}
		}
	}
	/**
	 * Deletes user properties. This will also remove property values from this
	 * element and derived elements.
	 * 
	 * @param obj
	 *            the element to clean up