Bug 146159 [Regression]Changing font operation doesn't work other than the first time
Description: The first time changing operation can work well. However, Change it again, it won't work. Steps: 1.Insert lable/text to layout or master page 2.Change the font from serif to cursive, it works well 3.Change the font again Result: The action doesn't work Additional infor: build number:200606080632
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
{
			DesignElementHandle handle = (DesignElementHandle) obj;
			String elementName = handle.getDefn( ).getDisplayName( );
			String displayName;
			if ( handle.getQualifiedName( ) != null
					&& !handle.getQualifiedName( ).equals( handle.getName( ) ) )
			{
				displayName = handle.getQualifiedName( );
			}
			else
			{
				displayName = handle
						.getDisplayLabel( DesignElementHandle.USER_LABEL );
			}
			if ( !StringUtil.isBlank( displayName ) )
			{
				if ( includeElementName )
				{
					return elementName + " - " + displayName; 
				}
				return displayName;
			}
			return elementName;
		}
		return ""; 
	}
	/**
	 * Gets the master page count.
	 * 
	 * @return the count of master page