Merge pull request #10579 from mwerezak/misc

Fixes

code/modules/mob/living/silicon/robot/drone/drone_items.dm

@@ -14,6 +14,7 @@
 		/obj/item/weapon/firealarm_electronics,
 		/obj/item/weapon/airalarm_electronics,
 		/obj/item/weapon/airlock_electronics,
+		/obj/item/weapon/tracker_electronics,
 		/obj/item/weapon/module/power_control,
 		/obj/item/weapon/stock_parts,
 		/obj/item/frame,

code/modules/mob/living/simple_animal/friendly/cat.dm

@@ -59,8 +59,13 @@
 		var/mob/dead/observer/spook = locate() in range(src,5)
 		if(spook)
 			var/turf/T = spook.loc
-			var/obj/O = pick(T.contents)
-			visible_emote("suddenly stops and stares at something unseen[istype(O) ? " near [O]":""].")
+			var/list/visible = list()
+			for(var/obj/O in T.contents)
+				if(!O.invisibility && O.name)
+					visible += O
+			if(visible.len)
+				var/atom/A = pick(visible)
+				visible_emote("suddenly stops and stares at something unseen[istype(A) ? " near [A]":""].")
 
 /mob/living/simple_animal/cat/proc/handle_movement_target()
 	//if our target is neither inside a turf or inside a human(???), stop