Make follow/mute/block buttons inactive if there is no relationship available
Since there are no relationships in statuses anymore pleroma-fe sometimes fails to load them by the time the user card is visible (most times it's just half a second before the default buttons get swapped with relationship-appropriate ones, but sometimes they wouldn't ever be swapped when navigating to the user's profile, can't consistently reproduce it though). It would be much less confusing if these buttons would just be loading spinners if there is no data available yet.