Bugfix: muted/blocked user notification streaming

Previously, the web streamer would not check block/mute status for generated notifications, and would send them regardless.

This had the unfortunate side-effect of having like-spam-bots appear repeatedly in streamed notifications (via, say, mastofe)

This changes that, such that all streamed notifications are checked for if they should actually be streamed

Closes #1105 (closed)