Add reply count to statuses

This is possible now that we have pleroma!974 (merged) merged and we're moving to Mastodon API.

e.g., Mastodon displays it like this

moved from pleroma#769 (moved)

assigned to @brendenbice1222

Seems like a duplicate of #405 (closed) and #374 (closed)

@Dave i can see that replies_count is now coming through mastodon api and this feature is not implemented. It's good to implement this feature now. If no one else is working on it, I'll implement it @Dave Please let me know

Yeah, we can probably close all of these issues when an amenable solution is merged. Sorry for opening a duplicate

mentioned in merge request !716 (merged)

mentioned in commit ee9aa400

closed via merge request !716 (merged)