Fixing bugs about the worst simple_animal coded in and material tiles. (#54885)

Fixed floorbots applying floor tiles onto already tiled turfs.
Fixed floorbot issues with material tiles.
Fixed emagged floorbots spawning lattice when deconstructing floor into plating.

code/game/objects/items/stacks/stack.dm

@@ -417,14 +417,15 @@
 		return FALSE
 	return TRUE
 
-/obj/item/stack/proc/merge(obj/item/stack/S) //Merge src into S, as much as possible
+///Merges src into S, as much as possible. If present, the limit arg overrides S.max_amount for transfer.
+/obj/item/stack/proc/merge(obj/item/stack/S, limit)
 	if(QDELETED(S) || QDELETED(src) || S == src) //amusingly this can cause a stack to consume itself, let's not allow that.
 		return
 	var/transfer = get_amount()
 	if(S.is_cyborg)
 		transfer = min(transfer, round((S.source.max_energy - S.source.energy) / S.cost))
 	else
-		transfer = min(transfer, S.max_amount - S.amount)
+		transfer = min(transfer, (limit ? limit : S.max_amount) - S.amount)
 	if(pulledby)
 		pulledby.start_pulling(S)
 	S.copy_evidences(src)

code/game/objects/items/stacks/tiles/light.dm

@@ -19,3 +19,8 @@
 			qdel(src)
 	else
 		return ..()
+
+/obj/item/stack/tile/light/place_tile(turf/open/T)
+	. = ..()
+	var/turf/open/floor/light/F = .
+	F?.state = state

code/game/objects/items/stacks/tiles/tile_types.dm

@@ -94,6 +94,11 @@
 	else
 		return ..()
 
+/obj/item/stack/tile/proc/place_tile(turf/open/T)
+	if(!turf_type || !use(1))
+		return
+	. = T.PlaceOnTop(turf_type, flags = CHANGETURF_INHERIT_AIR)
+
 //Grass
 /obj/item/stack/tile/grass
 	name = "grass tile"
@@ -421,6 +426,11 @@
 	material_flags = MATERIAL_ADD_PREFIX | MATERIAL_COLOR | MATERIAL_AFFECT_STATISTICS
 	merge_type = /obj/item/stack/tile/material
 
+/obj/item/stack/tile/material/place_tile(turf/open/T)
+	. = ..()
+	var/turf/open/floor/material/F = .
+	F?.set_custom_materials(mats_per_unit)
+
 /obj/item/stack/tile/eighties
 	name = "retro tile"
 	singular_name = "retro floor tile"