R1:beaf0bb89888

Improve Daemon console UI

Summary:
Makes various fixes to the Daemon console UI:

- Removes timeline, timeline cursors, and timeline-related controllers. This abstraction is all but dead and just waiting on an eventual cleanup effort with Facebook (see T2003). There's no need to inspect or debug it anymore.
- Instead of showing the 15 most recently launched non-exited daemons, show all the running daemons. With the old rule, "dead" daemons tended to build up at the bottom of the list -- e.g., secure.