[Logging] Logs with objects in them don't appear to contribute to the tab order

[lostintangent]

Repro Steps:

1. Open up this URL
2. Launch the Glimpse client
3. Select the request which corresponds to the /create route
4. Click the expand/collapse icon for the first log message in order to focus it.
5. Hit the <TAB> key a few times in order to navigate to one of the logged object records (ordinal number [EventSource] Add polyfill for Edge support #4-[Logging] Show logs that is not associate with a request #10)

Expected: To be able to use the keyboard to navigate to logged objects.
Actual: The logged object records don't appear to be a part of the tab order, and therefore, you end up skipping over them, which jumps you from message #3 to message #11.

Beyond being able to reach these logs via the tab order, it would also be great to be able to navigate into and out of the object hierarchy via the standard arrow keys.