Corrects some plane and layer issues

code/game/machinery/atmoalter/canister.dm

@@ -7,6 +7,8 @@
 	flags = CONDUCT
 	w_class = ITEMSIZE_HUGE
 
+	layer = TABLE_LAYER	// Above catwalks, hopefully below other things
+
 	var/valve_open = 0
 	var/release_pressure = ONE_ATMOSPHERE
 	var/release_flow_rate = ATMOS_DEFAULT_VOLUME_PUMP //in L/s

code/game/machinery/status_display.dm

@@ -12,8 +12,6 @@
 /obj/machinery/status_display
 	icon = 'icons/obj/status_display.dmi'
 	icon_state = "frame"
-	plane = TURF_PLANE
-	layer = ABOVE_TURF_LAYER
 	name = "status display"
 	anchored = 1
 	density = 0

code/game/objects/structures/catwalk.dm

@@ -1,10 +1,11 @@
 // Based on catwalk.dm from https://github.com/Endless-Horizon/CEV-Eris
 /obj/structure/catwalk
-	layer = TURF_LAYER + 0.5
-	icon = 'icons/turf/catwalks.dmi'
-	icon_state = "catwalk"
 	name = "catwalk"
 	desc = "Cats really don't like these things."
+	plane = TURF_PLANE
+	layer = ABOVE_UTILITY
+	icon = 'icons/turf/catwalks.dmi'
+	icon_state = "catwalk"
 	density = 0
 	var/health = 100
 	var/maxhealth = 100

code/game/objects/structures/grille.dm

@@ -7,7 +7,7 @@
 	anchored = 1
 	flags = CONDUCT
 	pressure_resistance = 5*ONE_ATMOSPHERE
-	layer = UNDER_JUNK_LAYER
+	layer = TABLE_LAYER
 	explosion_resistance = 1
 	var/health = 10
 	var/destroyed = 0

code/game/objects/structures/signs.dm

@@ -3,8 +3,7 @@
 	anchored = 1
 	opacity = 0
 	density = 0
-	plane = TURF_PLANE
-	layer = ABOVE_TURF_LAYER
+	layer = UNDER_JUNK_LAYER
 	w_class = ITEMSIZE_NORMAL
 
 /obj/structure/sign/ex_act(severity)

code/modules/reagents/reagent_dispenser.dm

@@ -6,7 +6,7 @@
 	icon = 'icons/obj/objects.dmi'
 	icon_state = "watertank"
 	plane = TURF_PLANE
-	layer = ABOVE_TURF_LAYER
+	layer = TABLE_LAYER	// Above catwalks, hopefully below other things
 	density = 1
 	anchored = 0
 	pressure_resistance = 2*ONE_ATMOSPHERE