Suspiciously easy alternative

Not sure why I didn't just do this in the first place...

code/_onclick/hud/screen_objects.dm

@@ -59,9 +59,11 @@
 /atom/movable/screen/action_button/attack_ghost(mob/dead/observer/user)
 	return
 
-/atom/movable/screen/action_button/clicked(mob/user)
+/atom/movable/screen/action_button/clicked(mob/user, list/mods)
 	if(!user || !source_action)
 		return TRUE
+	if(source_action.owner != user)
+		return TRUE
 
 	if(source_action.can_use_action())
 		source_action.action_activate()
@@ -97,7 +99,7 @@
 	icon_state = "hide"
 	var/hidden = 0
 
-/atom/movable/screen/action_button/hide_toggle/clicked(mob/user, mods)
+/atom/movable/screen/action_button/hide_toggle/clicked(mob/user, list/mods)
 	user.hud_used.action_buttons_hidden = !user.hud_used.action_buttons_hidden
 	hidden = user.hud_used.action_buttons_hidden
 	if(hidden)
@@ -107,7 +109,7 @@
 		name = "Hide Buttons"
 		icon_state = "hide"
 	user.update_action_buttons()
-	return 1
+	return TRUE
 
 /atom/movable/screen/action_button/ghost/minimap/get_button_screen_loc(button_number)
 	return "SOUTH:6,CENTER+1:24"
@@ -211,7 +213,7 @@
 		update_icon(user)
 	return 1
 
-/atom/movable/screen/clicked(mob/user)
+/atom/movable/screen/clicked(mob/user, list/mods)
 	if(!user)
 		return TRUE
 

code/_onclick/observer.dm

@@ -14,10 +14,6 @@
 	if(..())
 		return TRUE
 
-	// If the player is auto-observing someone, and they clicked on part of the target's UI.
-	if((observe_target_client || observe_target_mob) && istype(target, /atom/movable/screen))
-		return TRUE
-
 	if (mods["shift"] && mods["middle"])
 		point_to(target)
 		return TRUE

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

@@ -312,7 +312,7 @@
 	show_browser(user, dat, name, "mob[name]")
 
 /**
- * Handles any storage containers that `src` is looking inside when auto-observed.
+ * Handles any storage containers that the human is looking inside when auto-observed.
  */
 /mob/living/carbon/human/auto_observed(mob/dead/observer/observer)
 	. = ..()