[FIX] Check if room is mounted before setting state (#864)

* Tweaks on sequential threads messages

* Update tests

* Fix quote

* Prevent from deleting thread start message when positioned inside the thread

* Remove thread listener from RightButtons

* Fix error on thread start parse

* Stop parsing threads on render

* Check replied thread only if necessary

* Fix messages don't displaying

* Fix threads e2e

* RoomsListView.updateState slice

* Stop fetching hidden messages on threads

* Check if RoomView is mounted before rendering

* Refactor navigation events on RoomsListView

* Fix lint

* Fix listener