Wrong flow-id strings in markers when multi-selecting threads

[mstange]

Profile: https://share.firefox.dev/4iIAbAj

The nsUrlClassifierDBServiceWorker::OpenDb Runnable marker is displaying an incorrect string in its Runnable field. It should be displaying ace7644bf0160b330 but it's displaying some other random string.

I forgot to include the marker field format types flow-id and terminating-flow-id when I fixed #5098.

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