update_appearance (#55468)

Creates update_name and update_desc
Creates the wrapper proc update_appearance to batch update_name, update_desc, and update_icon together
Less non-icon handling code in update_icon and friends
Signal hooks for things that want to change names and descriptions
99%+ of the changes in this are just from switching everything over to update_appearance from update_icon

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

@@ -76,7 +76,7 @@
 					var/list/temp = SSmaterials.rigid_stack_recipes.Copy()
 					recipes += temp
 	update_weight()
-	update_icon()
+	update_appearance()
 
 /** Sets the amount of materials per unit for this stack.
  *
@@ -125,13 +125,15 @@
 
 /obj/item/stack/update_icon_state()
 	if(novariants)
-		return
+		return ..()
 	if(amount <= (max_amount * (1/3)))
 		icon_state = initial(icon_state)
-	else if (amount <= (max_amount * (2/3)))
+		return ..()
+	if (amount <= (max_amount * (2/3)))
 		icon_state = "[initial(icon_state)]_2"
-	else
-		icon_state = "[initial(icon_state)]_3"
+		return ..()
+	icon_state = "[initial(icon_state)]_3"
+	return ..()
 
 /obj/item/stack/examine(mob/user)
 	. = ..()
@@ -364,7 +366,7 @@
 		return TRUE
 	if(length(mats_per_unit))
 		update_custom_materials()
-	update_icon()
+	update_appearance()
 	update_weight()
 	return TRUE
 
@@ -402,7 +404,7 @@
 		amount += _amount
 	if(length(mats_per_unit))
 		update_custom_materials()
-	update_icon()
+	update_appearance()
 	update_weight()
 
 /** Checks whether this stack can merge itself into another stack.