Markup to be used instead of Granite.Widgets.SourceList.ExpandableItem.name
This would mean that &, <, etc have to be
escaped in the text, but basic formatting can be done on the item with HTML style tags.
Only the Granite.Widgets.SourceList.ExpandableItem.name
property is modified for editable items. So this property will
be need to updated and reformatted with editable items.
5.0