Filter reminder

[Coffee-Viking]

Is your feature request related to a problem? Please describe.
If you interacted with a community, user or instance and later blocked it, but still get comment replies to your inbox, you can't reply or click on the comment to get to the discussion, but are only shown a generic error.

Same if you later follow a link elsewhere (or even outside of Sync) that wants to open in app, but will only show "could not load post - retry".

Describe the solution you'd like
A toast/error saying "you blocked/filtered this community/user/etc.", and ideally an " temporary override" or "remove filter" button to get there regardless.