Icons folder cleaning wave two (#76788)

## About The Pull Request

Further continous organizing and cleaning the Icons folder. There are
still some minior nitpicks left to do, but I reached my daily sanity
expenses limit again, and the faster these get in the less issues for
both me and others later. Also cleans some mess I caused by my blindness
last PR.

## Why It's Good For The Game

Saner spriters = better sprites

code/modules/modular_computers/computers/item/computer.dm

@@ -6,7 +6,7 @@ GLOBAL_LIST_EMPTY(TabletMessengers) // a list of all active messengers, similar
 /obj/item/modular_computer
 	name = "modular microcomputer"
 	desc = "A small portable microcomputer."
-	icon = 'icons/obj/computer.dmi'
+	icon = 'icons/obj/machines/computer.dmi'
 	icon_state = "laptop"
 	light_on = FALSE
 	integrity_failure = 0.5

code/modules/modular_computers/computers/item/disks/computer_disk.dm

@@ -1,7 +1,7 @@
 /obj/item/computer_disk
 	name = "data disk"
 	desc = "Removable disk used to store data."
-	icon = 'icons/obj/module.dmi'
+	icon = 'icons/obj/assemblies/module.dmi'
 	icon_state = "datadisk6"
 	w_class = WEIGHT_CLASS_TINY
 	///The amount of storage space is on the disk

code/modules/modular_computers/computers/machinery/modular_computer.dm

@@ -2,7 +2,7 @@
 /obj/machinery/modular_computer
 	name = "modular computer"
 	desc = "You shouldn't see this. If you do, report it." //they should be examining the processor instead
-	icon = 'icons/obj/modular_console.dmi'
+	icon = 'icons/obj/machines/modular_console.dmi'
 	icon_state = "console"
 	idle_power_usage = BASE_MACHINE_IDLE_CONSUMPTION * 0.05
 	density = TRUE