Feature: Ability to select multiple rows in the marker table and copy their contents

[mstange]

Having the ability to copy a sequence of markers as plain text (e.g. for pasting into bugzilla) would be very useful, especially when looking at logging markers in the marker table.

┆Issue is synchronized with this Jira Task

[julienw]

see also https://github.com/firefox-devtools/profiler/issues/4660