Adds the ability for admins to "take the shot" and end rounds at their discretion. This is behind a two confirmation gate with a 20 second reflection period between them. All this is logged.

When mulligan antag is set to kick in, the suggestion for admins to end the round if they feel enough has happened is given. The option can also be found on the check antagonist panel.

The check antagonist panel will show what the muligan roundtype is if it exists.

If absolutely no one wants/can be the midround antags, the round ends there.

The round will end no matter what if the primary antagonist survived over an hour before biting it (unless the shuttle is already past the point of no return, in which case a peaceful ending takes priority)

Adds force_ending to VV editing protection, to avoid admins trying to shinanigans it on.

code/controllers/subsystem/ticker.dm

@@ -9,6 +9,7 @@ var/datum/subsystem/ticker/ticker
 
 	var/restart_timeout = 250				//delay when restarting server
 	var/current_state = GAME_STATE_STARTUP	//state of current round (used by process()) Use the defines GAME_STATE_* !
+	var/force_ending = 0					//Round was ended by admin intervention
 
 	var/hide_mode = 0
 	var/datum/game_mode/mode = null
@@ -91,7 +92,7 @@ var/datum/subsystem/ticker/ticker
 		if(GAME_STATE_PLAYING)
 			mode.process(wait * 0.1)
 
-			if(!mode.explosion_in_progress && mode.check_finished())
+			if(!mode.explosion_in_progress && mode.check_finished() || force_ending)
 				current_state = GAME_STATE_FINISHED
 				auto_toggle_ooc(1) // Turn it on
 				declare_completion()