Assorted bugfixes and tweaks + changelog

- Adds codersprites for tablet programs that are currently required.
- Adds computer icons to some programs that missed them.
- Temporarily removes separate keyboard icon states for consoles. They may be reimplemented in the future in a bit better way.
- Rebalanced sizes of programs a bit
- File manager is no longer downloadable, as it is part of each hard drive's ROM.
- Fixed runtime error when vending a laptop
- Adjusted some code segments as per Techhead's suggestions on github
- Adds changelog.

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

@@ -35,6 +35,9 @@
 	max_hardware_size = machinery_computer.max_hardware_size
 	steel_sheet_cost = machinery_computer.steel_sheet_cost
 
+/obj/item/modular_computer/processor/relay_qdel()
+	qdel(machinery_computer)
+
 /obj/item/modular_computer/processor/find_hardware_by_name(var/N)
 	var/obj/item/weapon/computer_hardware/H = machinery_computer.find_hardware_by_name(N)
 	if(H)