Settings: Should be able to apply expiring gags
Sometimes you want to mute a topic, not a person or thread, or maybe a single person talking about a specific topic. Allowing to say "reject if from:username contains:(#wwdc {iOS 11}) after:DATE before:DATE
" would be pretty handy!
Note that this is system-wide, rather than per-stream; we could also consider more dynamic stream filtering and searching support in future.
Inspired by discussion in: https://10centuries.org/post/125894