Storage Fix 2, Featuring Maths (#20535)

I had to unironically bust out my pen and paper for this bullshit and
magnifying tool to actually check if things were pixel perfect.

- bugfix: "Fixes storage box alignment and storage space UI to use
better maths."
- qol: "Tweaks IDs, IDs and firing pins now rotate 90 degrees when in
storage for easier clickability."
  - bugfix: "Fixes Item Tooltip toggle message."
- bugfix: "Fixes roundstart items in storage not showing item outlines."

Fixes #20529

---------

Signed-off-by: Wowzewow (Wezzy) <42310821+alsoandanswer@users.noreply.github.com>
Co-authored-by: Fluffy <65877598+FluffyGhoster@users.noreply.github.com>

code/modules/projectiles/pins.dm

@@ -29,11 +29,30 @@ Firing pins as a rule can't be removed without replacing them, blame a really sh
 	.=..()
 	if(istype(loc, /obj/item/gun))
 		gun = loc
+	update_icon()
+
+/obj/item/device/firing_pin/pickup(mob/user)
+	..()
+	update_icon()
+
+/obj/item/device/firing_pin/dropped(mob/user)
+	..()
+	update_icon()
+
+/obj/item/device/firing_pin/attack_hand()
+	..()
+	update_icon()
+
+/obj/item/firing_pin/update_icon()
+	var/matrix/tf = matrix()
+	if(istype(loc, /obj/item/storage))
+		tf.Turn(-90) //Vertical for storing compactly
+		tf.Translate(-1, 0) //Could do this with pixel_x but let's just update the appearance once.
+	transform = tf
 
 /obj/item/device/firing_pin/proc/examine_info() // Part of what allows people to see what firing mode  their wireless control pin is in. Returns nothing here if there's no wireless-control firing pin.
 		return
 
-
 /obj/item/device/firing_pin/afterattack(atom/target, mob/user, proximity_flag)
 	if(proximity_flag)
 		if(istype(target, /obj/item/gun))