Fixes check antagonists midround & latejoin injection timer displays

[DeityLink]

backend:

• in the admin Check Antagonists panel, the timers for the next Latejoin and Midround attempts are both easier to read, and now properly convert the process() ticks into seconds.

Before:

After

[kilozombie]

Whew, I was wondering why those never made any sense to me. Figured I misunderstood the system