Long status timeouts in status endpoints blocking browser requests

[Joe Kralicky]

When the browser is on a backend page (logging/monitoring), it sends a status request every 5 seconds to the selected backend's status api. If the status request takes a long time to reply, it will cause queued requests to get backed up, since the browser can only have 6 active concurrent requests at any given time.

The backend status APIs should make every attempt to return current status as fast as possible, and not block. Additionally, the dashboard should avoid making concurrent status calls to the same endpoint if possible.