Replace the alt click menu with the RPG Lootpanel (#17938)

* Port lootpanel without removing old obj panel

* Rip out the loot panel leaving examine tab intact

* some fixes

* we want nice icons

* that

* Switch to more robust hotkey detection

* Add a reminder to ctrl-r

---------

Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>

code/game/objects/items.dm

@@ -397,6 +397,7 @@
 
 // called just as an item is picked up (loc is not yet changed)
 /obj/item/proc/pickup(mob/user)
+	SEND_SIGNAL(src, COMSIG_ITEM_PICKUP, user)
 	pixel_x = 0
 	pixel_y = 0
 	return

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

@@ -29,6 +29,7 @@
 
 	var/pass_color = FALSE // Will the item pass its own color var to the created item? Dyed cloth, wood, etc.
 	var/strict_color_stacking = FALSE // Will the stack merge with other stacks that are different colors? (Dyed cloth, wood, etc)
+	var/is_building = FALSE
 
 /obj/item/stack/Initialize(mapload, var/starting_amount)
 	. = ..()
@@ -158,6 +159,9 @@
 	var/required = quantity*recipe.req_amount
 	var/produced = min(quantity*recipe.res_amount, recipe.max_res_amount)
 
+	if(is_building)
+		return
+
 	if (!can_use(required))
 		if (produced>1)
 			to_chat(user, span_warning("You haven't got enough [src] to build \the [produced] [recipe.title]\s!"))
@@ -175,9 +179,12 @@
 
 	if (recipe.time)
 		to_chat(user, span_notice("Building [recipe.title] ..."))
+		is_building = TRUE
 		if (!do_after(user, recipe.time))
+			is_building = FALSE
 			return
 
+	is_building = FALSE
 	if (use(required))
 		var/atom/O
 		if(recipe.use_material)

code/game/objects/trash_eating.dm

@@ -181,7 +181,7 @@
 	to_chat(user, span_notice("You can taste the sweet flavor of digital friendship. Or maybe it is something else."))
 
 /obj/item/reagent_containers/food/after_trash_eaten(var/mob/living/user)
-	if(!reagents.total_volume)
+	if(!reagents?.total_volume)
 		to_chat(user, span_notice("You can taste the flavor of garbage and leftovers. Delicious?"))
 	else
 		to_chat(user, span_notice("You can taste the flavor of gluttonous waste of food."))