Async and cleaning.

code/game/mecha/paintkits.dm

@@ -385,9 +385,14 @@
 		to_chat(user, span_warning("There are no skins for this mech type!"))
 		return ATTACK_CHAIN_PROCEED
 
+	INVOKE_ASYNC(src, PROC_REF(choose_paint), user, mech, possibilities)
+	return ATTACK_CHAIN_BLOCKED_ALL
+
+
+/obj/item/universal_paintkit/proc/choose_paint(mob/living/user, obj/mecha/mech, list/possibilities)
 	var/choice = tgui_input_list(user, "Pick your skin for mech.", "Paints", possibilities)
-	if(!choice)
-		return ATTACK_CHAIN_PROCEED
+	if(!choice || user.incapacitated() || !user.is_in_hands(src) || !user.Adjacent(mech))
+		return
 
 	user.visible_message(span_notice("[user] opens [src] and customises [mech.name]."))
 
@@ -400,4 +405,3 @@
 	mech.name = chosen_kit.new_name
 	mech.desc = chosen_kit.new_desc
 	mech.update_icon(UPDATE_ICON_STATE)
-	return ATTACK_CHAIN_BLOCKED_ALL

code/modules/economy/robotic_quests/robo_quests.dm

@@ -134,8 +134,6 @@
 	/// Custom item, leave empty if you okay with standart icon
 	var/icon_name
 	var/icon_file
-	/// Don`t touch
-	var/icon/tgui_icon
 	/// If emag only(Really??)
 	var/emag_only = FALSE
 
@@ -156,8 +154,6 @@
 	if(!name)
 		name = path::name	// It is better to know exactly what we are buying.
 
-	src.tgui_icon = icon(icon_file, icon_name, SOUTH, 1, FALSE)
-
 
 /datum/roboshop_item/bluespace_core
 	name = "bluespace anomaly core"
@@ -241,7 +237,7 @@
 
 /obj/item/disk/design_disk/roboquest/shield_breaker
 	name = "plasma pistol design"
-	desc = "his disk contains blueprints for production of plasma pistols."
+	desc = "This disk contains blueprints for production of plasma pistols."
 	design_type = /datum/design/real_plasma_pistol
 	hint_name = "plasma pistols"