Allows pathogenic incubator to remain on when it doesn't have a dish loaded, fixes lack of UI response, fixes overwriting blood viruses (#13040)

* Allowed use of controls, made incubator add viruses to blood instead of overwriting blood

* Allowed use of controls, made incubator add viruses to blood instead of overwriting blood

* third time's the commit that breaks everything in a way that isn't instantly detected and is thus PRable

* r u n t i m e s

* b r a c k e t s

code/modules/virus2/dishincubator.dm

@@ -95,8 +95,6 @@
 		if(beaker)
 			beaker.forceMove(src.loc)
 			beaker = null
-	if(!dish)
-		return
 	if (href_list["power"])
 		on = !on
 		if(on)
@@ -129,8 +127,7 @@
 				var/datum/disease2/disease/D = dish.virus2.getcopy()
 				D.log += "<br />[timestamp()] Injected into blood via [src] by [key_name(usr)]"
 				var/list/virus = list("[dish.virus2.uniqueID]" = D)
-				B.data["virus2"] = virus
-
+				B.data["virus2"] += virus
 				say("Injection complete.")
 	src.add_fingerprint(usr)
 	src.updateUsrDialog()
@@ -173,20 +170,21 @@
 	onclose(user, "dish_incubator")
 
 /obj/machinery/disease2/incubator/process()
-	if(dish && on && dish.virus2)
+	if(on)
 		use_power(50,EQUIP)
 		if(!powered(EQUIP))
 			on = 0
 			icon_state = "incubator"
-		if(foodsupply)
-			foodsupply -= 1
-			dish.growth = min(growthrate + dish.growth, INCUBATOR_MAX_SIZE)
+		if (dish && dish.virus2)
 			if(dish.growth >= INCUBATOR_MAX_SIZE)
 				if(icon_state != "incubator_fed")
 					icon_state = "incubator_fed"
 				if(last_notice + FED_PING_DELAY < world.time)
 					last_notice = world.time
 					alert_noise("ping")
+			if(foodsupply)
+				foodsupply -= 1
+				dish.growth = min(growthrate + dish.growth, INCUBATOR_MAX_SIZE)
 			if(radiation)
 				if(radiation > 50 & prob(mutatechance))
 					dish.virus2.log += "<br />[timestamp()] MAJORMUTATE (incubator rads)"
@@ -204,8 +202,7 @@
 				dish.virus2.infectionchance -= 1
 			if(toxins > 50)
 				dish.virus2 = null
-	else if(!dish)
-		on = 0
+	else
 		icon_state = "incubator"
 
 	if(beaker)