Bugfixes (#5682)

Wanted to fix one bug, but couldn't stop.

- Farmbot now have harvesting animation. 

- Farmbots no longer have two water tanks inside of them, that was causing them to use hidden water tank and not let it be refilled. Fixes #5677 

- Farmbots now will wait for weedlevel to be 5 or higher, that is when the alarm is triggered. And call `update_icon()` when it is done. Otherwise people wouldn't notice if they were killing weeds

- Vending machine now accept only items of the same type as defined in their product list. So you can no longer insert cult's ritual knife into Dinnerware. Fixes #5671 

- Merchants cannot by generic mech's weapon, it was replaced with UT AC 2 and Scatterbox. Fixes #5675 

- Ghosts cannot be teleported by telescience. Fixes #5688

code/modules/mob/living/bot/farmbot.dm

@@ -187,7 +187,7 @@
 			if(0)
 				return
 			if(FARMBOT_COLLECT)
-				action = "water" // Needs a better one
+				action = "collect"
 				update_icons()
 				visible_message("<span class='notice'>[src] starts [T.dead? "removing the plant from" : "harvesting"] \the [A].</span>")
 				attacking = 1
@@ -211,6 +211,7 @@
 				if(do_after(src, 30))
 					visible_message("<span class='notice'>[src] uproots the weeds in \the [A].</span>")
 					T.weedlevel = 0
+					T.update_icon()
 			if(FARMBOT_NUTRIMENT)
 				action = "fertile"
 				update_icons()
@@ -288,7 +289,7 @@
 	else if(refills_water && tray.waterlevel < 40 && !tray.reagents.has_reagent("water"))
 		return FARMBOT_WATER
 
-	else if(uproots_weeds && tray.weedlevel > 3)
+	else if(uproots_weeds && tray.weedlevel >= 5)
 		return FARMBOT_UPROOT
 
 	else if(replaces_nutriment && tray.nutrilevel < 1 && tray.reagents.total_volume < 1)
@@ -307,14 +308,6 @@
 	var/created_name = "Farmbot"
 	w_class = 3.0
 
-	New()
-		..()
-		spawn(4) // If an admin spawned it, it won't have a watertank it, so lets make one for em!
-			var tank = locate(/obj/structure/reagent_dispensers/watertank) in contents
-			if(!tank)
-				new /obj/structure/reagent_dispensers/watertank(src)
-
-
 /obj/structure/reagent_dispensers/watertank/attackby(var/obj/item/robot_parts/S, mob/user as mob)
 	if ((!istype(S, /obj/item/robot_parts/l_arm)) && (!istype(S, /obj/item/robot_parts/r_arm)))
 		..()