[FIX] Prevent duplicate cyborg upgrades (#26731)

* Disallows installing duplicate cyborg upgrades.

* Prevent duplicate Cyborg modules

* Unecessary spacing removed

* Update code/game/objects/items/robot/robot_upgrades.dm

Co-authored-by: CRUNCH <143041327+Fordoxia@users.noreply.github.com>
Signed-off-by: Adrer <erwin@lombok.demon.nl>

* usr > user

* Move nodrop check into do_install

* ... Why did I do that?

---------

Signed-off-by: Adrer <erwin@lombok.demon.nl>
Co-authored-by: adrermail@gmail.com <adrermail@gmail.com>
Co-authored-by: CRUNCH <143041327+Fordoxia@users.noreply.github.com>

code/modules/mob/living/silicon/robot/robot_mob.dm

@@ -965,11 +965,9 @@ GLOBAL_LIST_INIT(robot_verbs_default, list(
 		else if(!src.module && U.require_module)
 			to_chat(user, "<span class='warning'>The borg must choose a module before it can be upgraded!</span>")
 		else
-			if(!user.drop_item())
-				return
-			if(U.action(src))
+			if(U.action(user, src))
 				user.visible_message("<span class='notice'>[user] applied [U] to [src].</span>", "<span class='notice'>You apply [U] to [src].</span>")
-				U.forceMove(src)
+
 
 	else if(istype(W, /obj/item/mmi_radio_upgrade))
 		if(!opened)

code/modules/projectiles/guns/energy/kinetic_accelerator.dm

@@ -291,6 +291,7 @@
 	require_module = TRUE
 	module_type = /obj/item/robot_module/miner
 	usesound = 'sound/items/screwdriver.ogg'
+	allow_duplicate = TRUE
 	var/denied_type = null
 	var/maximum_of_type = 1
 	var/cost = 30
@@ -313,12 +314,12 @@
 	else
 		return ..()
 
-/obj/item/borg/upgrade/modkit/action(mob/living/silicon/robot/R)
+/obj/item/borg/upgrade/modkit/action(mob/user, mob/living/silicon/robot/R)
 	if(!..())
 		return
 
 	for(var/obj/item/gun/energy/kinetic_accelerator/cyborg/H in R.module.modules)
-		return install(H, usr)
+		return install(H, user)
 
 /obj/item/borg/upgrade/modkit/proc/install(obj/item/gun/energy/kinetic_accelerator/KA, mob/user)
 	. = TRUE