[APM] Service Maps: Duration and req/min are average values across all transaction types

[sorenlouv]

Currently the Service Maps popover shows duration (637ms) and throughput (7.35rpm) across all transaction types:

I'm not sure that having an average duration of 637ms says anything since it's a mix of background tasks (average of 1016ms) and requests (average of 91ms).

Proposal 1
Only show duration and throughput for "type=request".

Proposal 2
Show duration and throughput per type

Proposal 3
Add transaction type selector and show duration and throughput for the selected type

[elasticmachine]

Pinging @elastic/apm-ui (Team:apm)

[formgeist]

@sqren This is no longer relevant unless we feel it's the same possible confusion with different environment metrics together? I think the better option, as we've discussed, is to not have an All environments option available, but simply pick the first in the list (by amount of records) and let the user switch using the picker?

[sorenlouv]

Unless we introduce a transaction type selector (or one of the other proposals), this will still be an issue.

[formgeist]

As we agreed to move forward with proposal 3 ("Add transaction type selector and show duration and throughput for the selected type"), I've created #70419 to replace this issue and the improved design.