Add "Installed" icon to Dashboard list view.

Summary: Fixes T5478. For "personal" installs use the person icon; for global use the global icon. For both providing explanatory tooltip text about what's going on. This will need to be updated if / when we start installing dashboards to other applications. Also, this query isn't 100% optimized but the major part *is* so I think its okay.

Test Plan: Installed a dashboard for personal use and verified correct icon / text showed up. Did the same for global installed dashboard...!

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5478

Differential Revision: https://secure.phabricator.com/D10181