Fix inventory hands clickable areas & confusing overlay (#26212)

* Remove confusing hand overlay

Co-Authored-By: Serge K Lebedev <hello@sergelebe.dev>

* Fix clickable areas of equipped items

Co-Authored-By: Serge K Lebedev <hello@sergelebe.dev>

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Co-authored-by: Serge K Lebedev <hello@sergelebe.dev>

code/game/objects/items.dm

@@ -476,6 +476,7 @@ GLOBAL_DATUM_INIT(welding_sparks, /mutable_appearance, mutable_appearance('icons
 	if((flags & NODROP) && !(initial(flags) & NODROP)) // Remove NODROP if dropped. Probably from delimbing.
 		flags &= ~NODROP
 	in_inventory = FALSE
+	mouse_opacity = initial(mouse_opacity)
 	remove_outline()
 	SEND_SIGNAL(src, COMSIG_ITEM_DROPPED,user)
 	if(!silent)
@@ -522,6 +523,7 @@ GLOBAL_DATUM_INIT(welding_sparks, /mutable_appearance, mutable_appearance('icons
 // for items that can be placed in multiple slots
 // Initial is used to indicate whether or not this is the initial equipment (job datums etc) or just a player doing it
 /obj/item/proc/equipped(mob/user, slot, initial = FALSE)
+	mouse_opacity = MOUSE_OPACITY_OPAQUE
 	SEND_SIGNAL(src, COMSIG_ITEM_EQUIPPED, user, slot)
 	for(var/X in actions)
 		var/datum/action/A = X

code/game/objects/items/weapons/storage/storage_base.dm

@@ -534,7 +534,6 @@
 		I.maptext = ""
 	I.on_exit_storage(src)
 	update_icon()
-	I.mouse_opacity = initial(I.mouse_opacity)
 	return TRUE
 
 /obj/item/storage/Exited(atom/A, loc)