Adds a verb to hide action buttons (#5304)

Adds a verb on /client to show/hide action buttons
Makes it a new variable, as var/hidden also prevents the action from
being used

![image](https://github.com/cmss13-devs/cmss13/assets/56142455/1d78441c-5085-4165-a2b7-f7c3e9f7e2c3)

:cl:
qol: Adds the ability to hide your action buttons
/:cl:

code/datums/action.dm

@@ -11,9 +11,9 @@
 	var/cost = 0 // By default an action has no cost -> will be utilized by skill actions/xeno actions
 	var/action_flags = 0 // Check out __game.dm for flags
 	/// Whether the action is hidden from its owner
-	/// Useful for when you want to preserve action state while preventing
-	/// a mob from using said action
-	var/hidden = FALSE
+	var/hidden = FALSE //Preserve action state while preventing mob from using action
+	///Hide the action from the owner without preventing them from using it (incase of keybind listen_signal)
+	var/player_hidden = FALSE
 	var/unique = TRUE
 	/// A signal on the mob that will cause the action to activate
 	var/listen_signal
@@ -227,7 +227,7 @@
 			var/atom/movable/screen/action_button/B = A.button
 			if(reload_screen)
 				client.add_to_screen(B)
-			if(A.hidden)
+			if(A.hidden || A.player_hidden)
 				B.screen_loc = null
 				continue
 			button_number++

code/modules/client/client_procs.dm

@@ -820,3 +820,32 @@ GLOBAL_LIST_INIT(whitelisted_client_procs, list(
 		xeno_prefix = "XX"
 	if(!xeno_postfix || xeno_name_ban)
 		xeno_postfix = ""
+
+/client/verb/action_hide_menu()
+	set name = "Show/Hide Actions"
+	set category = "IC"
+
+	var/mob/user = usr
+
+	var/list/actions_list = list()
+	for(var/datum/action/action as anything in user.actions)
+		var/action_name = action.name
+		if(action.player_hidden)
+			action_name += " (Hidden)"
+		actions_list[action_name] += action
+
+	if(!LAZYLEN(actions_list))
+		to_chat(user, SPAN_WARNING("You have no actions available."))
+		return
+
+	var/selected_action_name = tgui_input_list(user, "Show or hide selected action", "Show/Hide Actions", actions_list, 30 SECONDS)
+	if(!selected_action_name)
+		to_chat(user, SPAN_WARNING("You did not select an action."))
+		return
+
+	var/datum/action/selected_action = actions_list[selected_action_name]
+	selected_action.player_hidden = !selected_action.player_hidden
+	user.update_action_buttons()
+
+	if(!selected_action.player_hidden && selected_action.hidden) //Inform the player that even if they are unhiding it, itll still not be visible
+		to_chat(user, SPAN_NOTICE("[selected_action] is forcefully hidden, bypassing player unhiding."))