Mob Hunt Adjustments

Removes server instability, random disconnects, and server crash due to
trap mobs / high player count

Trap mobs are now capped just like normal spawns
- If a trap mob is created that would push the total number of trap mobs
over this limit, the server will remove the oldest trap mob (effectively
replacing it)

Changes health from a list using magic numbers to an associated list for
readability (doesn't make sense to have two vars for what little uses
this)

Converts mob displaying to use the alternate appearance system, to allow
for a per-mob control over visibility
- Only will show for mobs that are holding a PDA with a game client that
is connected to the game server.
- Nanomobs properly are concealed from player mobs after being interacted
with (capture/escape), PDA dropped, or game client disconnection
- Game client will disconnect from game server when you change the active
PDA app (including going to PDA main menu) and/or eject the game cartridge

Also finished my thought in that one comment. It's about time I-

code/modules/pda/mob_hunt_game_app.dm

@@ -17,6 +17,7 @@
 	var/hacked = 0		//if set, this cartridge is able to spawn trap mobs from its collection (set via emag_act on the cartridge)
 	var/catch_mod = 0	//used to adjust the likelihood of a mob running from this client, a negative value means it is less likely to run (support for temporary bonuses)
 	var/wild_captures = 0		//used to track the total number of mobs captured from the wild (does not count card mobs) by this client
+	var/scan_range = 3			//maximum distance (in tiles) from which the client can reveal nearby mobs
 
 /datum/data/pda/app/mob_hunter_game/start()
 	..()
@@ -24,18 +25,20 @@
 
 /datum/data/pda/app/mob_hunter_game/stop()
 	..()
+	disconnect("Program Terminated")
 	processing_objects.Remove(pda)
 
 /datum/data/pda/app/mob_hunter_game/proc/scan_nearby()
 	if(!mob_hunt_server || !connected)
 		return
-	for(var/turf/T in range(3, get_turf(pda)))
-		for(var/obj/O in T.contents)
-			if(!istype(O, /obj/effect/nanomob))
-				continue
-			var/obj/effect/nanomob/N = O
-			//reveal the mob
-			N.reveal()
+	for(var/turf/T in range(scan_range, get_turf(pda)))
+		for(var/obj/effect/nanomob/N in T.contents)
+			if(src in N.clients_encountered)
+				//hide the mob
+				N.conceal()
+			else
+				//reveal the mob
+				N.reveal()
 
 /datum/data/pda/app/mob_hunter_game/proc/reconnect()
 	if(!mob_hunt_server || !mob_hunt_server.server_status || connected)
@@ -47,10 +50,20 @@
 		pda.audible_message("[bicon(pda)] Connection established. Capture all of the mobs, [pda.owner ? pda.owner : "hunter"]!", null, 2)
 	return 1
 
+/datum/data/pda/app/mob_hunter_game/proc/get_player()
+	if(!pda)
+		return null
+	if(ishuman(pda.loc))
+		var/mob/living/carbon/human/H = pda.loc
+		return H
+	return null
+
 /datum/data/pda/app/mob_hunter_game/proc/disconnect(reason = null)
 	if(!mob_hunt_server || !connected)
 		return
 	mob_hunt_server.connected_clients -= src
+	for(var/obj/effect/nanomob/N in (mob_hunt_server.normal_spawns + mob_hunt_server.trap_spawns))
+		N.conceal(list(get_player()))
 	connected = 0
 	//show a disconnect message if we were disconnected involuntarily (reason argument provided)
 	if(pda && reason)
@@ -105,8 +118,6 @@
 	if(mob_info.is_shiny)
 		entry["sprite"] = "[mob_info.icon_state_shiny].png"
 	data["entry"] = entry
-	for(var/a in entry)
-		log_debug("[a] = [entry[a]]")
 
 /datum/data/pda/app/mob_hunter_game/proc/assign_nickname()
 	if(!my_collection.len)