check if a thread is muted before incrementing notif badge, filter out quotes (#2686)
* check if a thread is muted before incrementing notif badge
* some filtering for quotes and reposts
* move logic to util
* change logic
* revert always fetching
* logic for cases when we don't have a subject (count)
* unneeded change
* check subject embed in `isThreadMuted`
* remove todo