Arranges lots of things into planes (#5072)

* Rearranges a billion things into planes

* Make cryotubes fancy

* Update Travis

* Fix hiding logic

code/game/objects/items/shooting_range.dm

@@ -104,7 +104,6 @@
 		bmark.pixel_x = p_x
 		bmark.pixel_y = p_y
 		bmark.icon = 'icons/effects/effects.dmi'
-		bmark.layer = 3.5
 		bmark.icon_state = "scorch"
 
 		if(decaltype == 1)

code/game/objects/items/weapons/id cards/cards.dm

@@ -46,7 +46,6 @@
 	name = "\proper the coordinates to clown planet"
 	icon_state = "data"
 	item_state = "card-id"
-	layer = 3
 	level = 2
 	desc = "This card contains coordinates to the fabled Clown Planet. Handle with care."
 	function = "teleporter"

code/game/objects/items/weapons/policetape.dm

@@ -30,7 +30,7 @@ var/list/tape_roll_applications = list()
 	name = "tape"
 	icon = 'icons/policetape.dmi'
 	anchored = 1
-	layer = 3.2
+	layer = WINDOW_LAYER
 	var/lifted = 0
 	var/crumpled = 0
 	var/tape_dir = 0
@@ -257,7 +257,7 @@ var/list/tape_roll_applications = list()
 		else
 			var/obj/item/tape/P = new tape_type(T)
 			P.update_icon()
-			P.layer = 3.2
+			P.layer = WINDOW_LAYER
 			user << "<span class='notice'>You finish placing \the [src].</span>"
 
 	if (istype(A, /turf/simulated/floor) ||istype(A, /turf/unsimulated/floor))
@@ -307,10 +307,11 @@ var/list/tape_roll_applications = list()
 
 /obj/item/tape/proc/lift(time)
 	lifted = 1
-	layer = 8
+	plane = MOB_PLANE
+	layer = ABOVE_MOB_LAYER
 	spawn(time)
 		lifted = 0
-		layer = initial(layer)
+		reset_plane_and_layer()
 
 // Returns a list of all tape objects connected to src, including itself.
 /obj/item/tape/proc/gettapeline()

code/game/objects/items/weapons/tape.dm

@@ -131,7 +131,7 @@
 	icon = 'icons/obj/bureaucracy.dmi'
 	icon_state = "tape"
 	w_class = ITEMSIZE_TINY
-	layer = 4
+	plane = MOB_PLANE
 	anchored = 1 //it's sticky, no you cant move it
 
 	var/obj/item/weapon/stuck = null

code/game/objects/items/weapons/trays.dm

@@ -188,7 +188,7 @@
 			carrying.Add(I)
 			Img.icon = I.icon
 			Img.icon_state = I.icon_state
-			Img.layer = 30 + I.layer
+			Img.layer = layer + I.layer*0.01
 			if(istype(I, /obj/item/weapon/material))
 				var/obj/item/weapon/material/O = I
 				if(O.applies_material_colour)