some cherrypicked TG fixes and tweaks

code/game/data_huds.dm

@@ -222,7 +222,7 @@
 	var/icon/I = icon(icon, icon_state, dir)
 	holder.pixel_y = I.Height() - world.icon_size
 	holder.icon_state = "hudno_id"
-	if(wear_id)
+	if(wear_id?.GetID())
 		holder.icon_state = "hud[ckey(wear_id.GetJobName())]"
 	sec_hud_set_security_status()
 

code/game/gamemodes/objective.dm

@@ -378,6 +378,8 @@ GLOBAL_LIST_EMPTY(objectives)
 	for(var/datum/mind/M in owners)
 		if(considered_alive(M))
 			return FALSE
+		if(M.current?.suiciding) //killing yourself ISN'T glorious.
+			return FALSE
 	return TRUE
 
 /datum/objective/nuclear

code/game/machinery/_machinery.dm

@@ -91,6 +91,7 @@ Class Procs:
 	verb_yell = "blares"
 	pressure_resistance = 15
 	max_integrity = 200
+	layer = BELOW_OBJ_LAYER //keeps shit coming out of the machine from ending up underneath it.
 
 	anchored = TRUE
 	interaction_flags_atom = INTERACT_ATOM_ATTACK_HAND | INTERACT_ATOM_UI_INTERACT
@@ -120,7 +121,7 @@ Class Procs:
 		armor = list("melee" = 25, "bullet" = 10, "laser" = 10, "energy" = 0, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 50, "acid" = 70)
 	. = ..()
 	GLOB.machines += src
-	
+
 	if(ispath(circuit, /obj/item/circuitboard))
 		circuit = new circuit
 		circuit.apply_default_parts(src)

code/game/machinery/harvester.dm

@@ -131,18 +131,24 @@
 	playsound(src, 'sound/machines/microwave/microwave-end.ogg', 100, 0)
 
 /obj/machinery/harvester/screwdriver_act(mob/living/user, obj/item/I)
-	. = ..()
-	if(.)
-		return TRUE
-	if(!state_open && !occupant)
-		if(default_deconstruction_screwdriver(user, "[initial(icon_state)]-o", initial(icon_state), I))
-			return
+	. = TRUE
+	if(..())
+		return
+	if(occupant)
+		to_chat(user, "<span class='warning'>[src] is currently occupied!</span>")
+		return
+	if(state_open)
+		to_chat(user, "<span class='warning'>[src] must be closed to [panel_open ? "close" : "open"] it's maintenance hatch!</span>")
+		return
+	if(default_deconstruction_screwdriver(user, "[initial(icon_state)]-o", initial(icon_state), I))
+		return
+	return FALSE
 
 /obj/machinery/harvester/crowbar_act(mob/living/user, obj/item/I)
 	if(default_pry_open(I))
-		return
+		return TRUE
 	if(default_deconstruction_crowbar(I))
-		return
+		return TRUE
 
 /obj/machinery/harvester/default_pry_open(obj/item/I) //wew
 	. = !(state_open || panel_open || (flags_1 & NODECONSTRUCT_1)) && I.tool_behaviour == TOOL_CROWBAR //We removed is_operational() here
@@ -181,4 +187,4 @@
 	if(state_open)
 		to_chat(user, "<span class='notice'>[src] must be closed before harvesting.</span>")
 	else if(!harvesting)
-		to_chat(user, "<span class='notice'>Alt-click [src] to start harvesting.</span>")
+		to_chat(user, "<span class='notice'>Alt-click [src] to start harvesting.</span>")