In Task Graphs, provide a parent/child hint and fix weird strikethrough
- Apparently fix weird strikethrough effect? Spooky!
- Provide a little icon hint in the left column about which tasks are direct parents/children, vs just reachable somehow. I don't think this is super useful/important, but seems maybe nice?
Reviewed By: chad
Differential Revision: https://secure.phabricator.com/D16342