Fixes stacks acting strange for cyborgs

Robot modules weren't handling qdel'd stacks properly, so now they
simply don't get qdel'd. They shouldn't get deleted often enough for
this to hurt performance.

Also, the module slot of a stack will now be deselected when it's used
up, and it will show up immediately when respawned while recharging.

code/modules/mob/living/silicon/robot/inventory.dm

@@ -220,3 +220,8 @@
 	while(slot_start != slot_num) //If we wrap around without finding any free slots, just give up.
 
 	return
+
+/mob/living/silicon/robot/unEquip(obj/item/I)
+	if(I == module_active)
+		deselect_module(get_selected_module())
+	return ..()

code/modules/mob/living/silicon/robot/robot_modules.dm

@@ -37,6 +37,7 @@
 
 	if(!stacktypes || !stacktypes.len) return
 
+	var/stack_respawned = 0
 	for(var/T in stacktypes)
 		var/O = locate(T) in src.modules
 		var/obj/item/stack/S = O
@@ -46,9 +47,12 @@
 			S = new T(src)
 			src.modules += S
 			S.amount = 1
+			stack_respawned = 1
 
 		if(S && S.amount < stacktypes[T])
 			S.amount++
+	if(stack_respawned && istype(R) && R.hud_used)
+		R.hud_used.update_robot_modules_display()
 
 /obj/item/weapon/robot_module/proc/rebuild()//Rebuilds the list so it's possible to add/remove items from the module
 	var/list/temp_list = modules