- Display details in isolate selection dropdown
- Sort isolates by peak live heap memory

Bug: v8:7266
Change-Id: I01dd6cced4a5febd8e58cc4b7e2bb337c30f0812
No-try: true
Reviewed-on: https://chromium-review.googlesource.com/916062Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51282}