The final action buttons PR (#16514)

* Make action button target datum

* Initial working action palette

* Action related refactors

* tgstation/tgstation/pull/71339

code/modules/mob/living/carbon/carbon.dm

@@ -455,7 +455,7 @@
 		throw_alert("handcuffed", /obj/screen/alert/restrained/handcuffed, new_master = handcuffed)
 	else
 		clear_alert("handcuffed")
-	update_action_buttons_icon() //some of our action buttons might be unusable when we're handcuffed.
+	update_mob_action_buttons() //some of our action buttons might be unusable when we're handcuffed.
 	update_inv_handcuffed()
 
 // Clears blood overlays

code/modules/mob/living/death.dm

@@ -1,6 +1,6 @@
 /mob/living/death(gibbed)
 	clear_fullscreens()
-	update_action_buttons_icon()
+	update_mob_action_buttons()
 	if(ai_holder)
 		ai_holder.go_sleep()
 

code/modules/mob/living/living.dm

@@ -973,7 +973,7 @@
 	if(lying != lying_prev)
 		lying_prev = lying
 		update_transform()
-		update_action_buttons_icon(status_only = TRUE)
+		update_mob_action_buttons()
 		//VOREStation Add
 		if(lying && LAZYLEN(buckled_mobs))
 			for(var/mob/living/L as anything in buckled_mobs)

code/modules/mob/login.dm

@@ -32,8 +32,9 @@
 
 	client.images = null				//remove the images such as AIs being unable to see runes
 	client.screen = list()				//remove hud items just in case
-	if(hud_used)	qdel(hud_used)		//remove the hud objects
-	hud_used = new /datum/hud(src)
+	if(hud_used)
+		qdel(hud_used)		//remove the hud objects
+	new /datum/hud(src)
 
 	if(client.prefs && client.prefs.client_fps)
 		client.fps = client.prefs.client_fps