When viewing a workboard, only link to parent workboards in crumbs if parents have workboards
However, this isn't a great destination if an ancestor doesn't actually have a workboard. In this case, point at the normal profile URI instead.
- Viewed a milestone workboard with a parent that had no workboard. Saw a profile link instead of a workboard link (new behavior).
- Viewed a milestone workboard with a parent that also had a workboard. Saw a workboard link (existing old behavior still works).
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D20517