BayMerge Bugfix; Fixing guns, update computers. (#1263)

Fixes all the snowflake guns unique to our codebase with multiple firemodes so that they now actually behave correctly. Fixes a few bugs relating to computers, and updates modular_computers to use holoscreens.

code/modules/mob/living/silicon/robot/drone/drone_console.dm

@@ -2,7 +2,7 @@
 	name = "Maintenance Drone Control"
 	desc = "Used to monitor the station's drone population and the assembler that services them."
 	icon = 'icons/obj/computer.dmi'
-	icon_keyboard = "power_key"
+
 	icon_screen = "power"
 	req_access = list(access_engine_equip)
 	circuit = /obj/item/weapon/circuitboard/drone_control

code/modules/mob/living/simple_animal/friendly/mouse.dm

@@ -34,6 +34,7 @@
 	meat_amount = 1
 	var/body_color //brown, gray and white, leave blank for random
 	layer = MOB_LAYER
+	mob_size = MOB_MINISCULE
 	min_oxy = 16 //Require atleast 16kPA oxygen
 	minbodytemp = 223		//Below -50 Degrees Celcius
 	maxbodytemp = 323	//Above 50 Degrees Celcius