Allows you to choose how much to insert into protolathe/exofab/circuitprinter/dronedispenser (#31399)

* precision

* precision

* sanity checks

* itt kevinz doesn't know how cyberboss procs work

* fixes

* allows user cancellation

* im dumb

* itt: im still dumb

* fixes stuff, makes it set on init

* refactors reagentgrinder code

* more fixes, prevents melee attacks from going anyways

* ...? wtf is with usetopic

* Finally found out what's wrongw ith this thing.

* fixes a mistake

code/game/machinery/droneDispenser.dm

@@ -56,6 +56,7 @@
 	. = ..()
 	var/datum/component/material_container/materials = AddComponent(/datum/component/material_container, list(MAT_METAL, MAT_GLASS), MINERAL_MATERIAL_AMOUNT * MAX_STACK_SIZE * 2, TRUE)
 	materials.insert_amount(starting_amount)
+	materials.precise_insertion = TRUE
 	using_materials = list(MAT_METAL=metal_cost, MAT_GLASS=glass_cost)
 
 /obj/machinery/droneDispenser/preloaded

code/game/mecha/mech_fabricator.dm

@@ -35,9 +35,10 @@
 								)
 
 /obj/machinery/mecha_part_fabricator/Initialize()
-	AddComponent(/datum/component/material_container,
+	var/datum/component/material_container/materials = AddComponent(/datum/component/material_container,
 	 list(MAT_METAL, MAT_GLASS, MAT_SILVER, MAT_GOLD, MAT_DIAMOND, MAT_PLASMA, MAT_URANIUM, MAT_BANANIUM, MAT_TITANIUM, MAT_BLUESPACE),
 		FALSE, list(/obj/item/stack, /obj/item/ore/bluespace_crystal), CALLBACK(src, .proc/is_insertion_ready))
+	materials.precise_insertion = TRUE
 	. = ..()
 	files = new /datum/research(src) //Setup the research data holder.