Fix bugs with the first reply to a thread (#4104)
* WIP fix for bugs first-thread-reply bugs
* Add re-emitter before we start adding events, as per comment
* Add test for notification bug
* Test for the bug that caused the dot to be the wrong colour
* Add comment
* elaborate
* Fix outdated comment
* Also fix this comment
* Fix another comment
* Fix typo
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
* Clarify comment
* More comment
* so much comment
also reformat (the bit that's actually added is s/it/this.addEvents/)
* The comments
* Maybe make comment clearer.
* Add comment about potential race
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Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
