Show how much "servers" are in paused or running

[glamorous]

If you have multiple servers running horizon, you only "pause" one server, the one which you enter the command. It would be helpfull if you can see which "host" is paused. Better should be if the status above show the count of running "hosts" and only shows "paused" when all of them are paused. On each server there could be a status showing it is running or not.

For example:
You have 4 running servers: status = Active (4/4)
You have 3 running servers: status = Active (3/4)
You have 2 running servers: status = Active (2/4)
You have 1 running servers: status = Active (1/4)
You have 0 running servers: status = Paused

If this something that would be a good thing to add, I would try to add this feature in a PR.

[driesvints]

@glamorous feel free to attempt a PR. Depending on how complex it would become we can consider it or not.

[glamorous]

Added a PR with possible solution/improvement #928