Order friends by rating, last active, most games time control and maybe other criteria

[Siderite]

I like that the icons show which kind of game I played with the friends. But maybe the best criterion for culling is: players who have not been active for a long time. Similarly, sorting by rating would make it easier to preserve higher-rated friends.

https://lichess.org/forum/lichess-feedback/please-enable-me-to-pick-different-sort-orders-when-listing-people-i-follow

[Siderite]

While ordering is possible, it is complicated:

• the paginated API for followed players must be used (which lacks the last time seen value) which would probably lead to overload responses for people with 400 friends
• the last seen at measure has to be formatted in various languages
• the ratings cannot be compared as some players have bullet and other have blitz ratings returned.

Therefore the implementation will be different, just adding a new filter for inactive players (haven't played in a year)

Implemented as such in v2.3.148