Made drones store their picked color and return to it when unhacked

code/modules/mob/living/simple_animal/friendly/drone/_drone.dm

@@ -51,6 +51,7 @@
 	var/staticChoice = "static"
 	var/list/staticChoices = list("static", "blank", "letter", "animal")
 	var/picked = FALSE //Have we picked our visual appearence (+ colour if applicable)
+	var/colour = "grey"	//Stored drone color, so we can go back when unhacked.
 	var/list/drone_overlays[DRONE_TOTAL_LAYERS]
 	var/laws = \
 	"1. You may not involve yourself in the matters of another being, even if such matters conflict with Law Two or Law Three, unless the other being is another Drone.\n"+\

code/modules/mob/living/simple_animal/friendly/drone/interaction.dm

@@ -179,7 +179,7 @@
 		else if(visualAppearence == REPAIRDRONE_HACKED)
 			visualAppearence = REPAIRDRONE
 		else if(visualAppearence == MAINTDRONE_HACKED)
-			visualAppearence = MAINTDRONE
+			visualAppearence = MAINTDRONE + "_[colour]"
 	else if(hacked)
 		if(visualAppearence == SCOUTDRONE)
 			visualAppearence = SCOUTDRONE_HACKED

code/modules/mob/living/simple_animal/friendly/drone/visuals_icons.dm

@@ -110,7 +110,7 @@
 	switch(appearence)
 		if("Maintenance Drone")
 			visualAppearence = MAINTDRONE
-			var/colour = input("Choose your colour!", "Colour", "grey") in list("grey", "blue", "red", "green", "pink", "orange")
+			colour = input("Choose your colour!", "Colour", "grey") in list("grey", "blue", "red", "green", "pink", "orange")
 			icon_state = "[visualAppearence]_[colour]"
 			icon_living = "[visualAppearence]_[colour]"
 			icon_dead = "[visualAppearence]_dead"