DevTools CPU profiler pane functionality should be on-par with Observatory

[bkonyi]

See Observatory -> DevTools Tracking Issue.

Performance tooling functionality from Observatory that’s not present in DevTools:

• Changing between code/function CPU profiles (PR)
• Call tree filtering
• Tag ordering (VM, User, None) (PR)
• Last refresh time
• profiler stats (@kenzieschmoll)
• Go-to source from tree entry
• Method table view (tracked at Add method table to CPU profiler #841) (@kenzieschmoll)
• closure display is incomplete (Profiler does not show class and method for closures #5354)

Observatory CPU Profile View

Observatory CPU Profile Method Table View

[kenzieschmoll]

tracking the last refresh time data at #5382. This is non critical and marked as such. Closing this issue now that the method table has been added.