Scope various unscoped locate() calls (#42195)

* Scope locate calls which are immediately checked against a list

* Remove silly use of locate from bible Topic

* Scope various locate calls (needs testing)

* More WIP

* Buff up lightswitches while we're here

* Tidy record browsing code

* Scope a few more locates

These have caused problems in the past (#41917, #39303). Continues #29349.

Also cleans up lightswitch code while I was already touching it.

I recommend a testmerge.

code/modules/admin/secrets.dm

@@ -126,7 +126,7 @@
 			log_admin("[key_name(usr)] reset the thunderdome to default with delete_mobs==[delete_mobs].", 1)
 			message_admins("<span class='adminnotice'>[key_name_admin(usr)] reset the thunderdome to default with delete_mobs==[delete_mobs].</span>")
 
-			var/area/thunderdome = locate(/area/tdome/arena)
+			var/area/thunderdome = GLOB.areas_by_type[/area/tdome/arena]
 			if(delete_mobs == "Yes")
 				for(var/mob/living/mob in thunderdome)
 					qdel(mob) //Clear mobs
@@ -134,7 +134,7 @@
 				if(!istype(obj, /obj/machinery/camera))
 					qdel(obj) //Clear objects
 
-			var/area/template = locate(/area/tdome/arena_source)
+			var/area/template = GLOB.areas_by_type[/area/tdome/arena_source]
 			template.copy_contents_to(thunderdome)
 
 		if("clear_virus")