How do I use Shortcuts with PopupMenus?

Godot Version

4.5.1.stable

Question

Im trying to attach custom items and shortcuts to those items to the popup menu of a CodeEdit node. Im not really sure what Im doing wrong because it seems like everything is hooked up correctly. I first tried using accelerators but turns out thats not even supported on another other platform except MacOS (check this). So I tried with Shortcut but that doesnt seem to work either. What am I doing wrong?

extends CodeEdit

## Extra popup menu item ids.
enum CustomMenuItems {
	MENU_MOVE_LINE_UP = MENU_MAX + 1,
	MENU_MOVE_LINE_DOWN = MENU_MOVE_LINE_UP + 1,
}


func _ready() -> void:
	_set_up_popup_menu_items()
	grab_focus.call_deferred()


func _set_up_popup_menu_items() -> void:
	var menu: PopupMenu = get_menu()
	menu.remove_item(menu.get_item_index(MENU_EMOJI_AND_SYMBOL))
	menu.remove_item(menu.get_item_index(MENU_EMOJI_AND_SYMBOL) + 1) # Remove separator.
	menu.remove_item(menu.get_item_index(MENU_CLEAR))
	menu.item_count = menu.get_item_index(MENU_REDO) + 1 # Remove all items after "Redo".
	menu.add_separator("", menu.get_item_index(MENU_MAX) + 1)
	
	_add_popup_menu_item(
		menu,
		KEY_UP,
		"Move Line Up",
		CustomMenuItems.MENU_MOVE_LINE_UP,
		true
	)
	
	menu.id_pressed.connect(_on_popup_menu_item_pressed)


func _add_popup_menu_item(
	menu: PopupMenu,
	keycode: Key,
	label: String,
	id: int = -1,
	alt: bool = false,
	ctrl: bool = false,
	meta: bool = false,
	shift: bool = false,
	command_or_control_autoremap: bool = false
) -> void:
	var shortcut := Shortcut.new()
	
	var input_key := InputEventKey.new()
	input_key.keycode = keycode
	input_key.alt_pressed = alt
	input_key.ctrl_pressed = ctrl
	input_key.meta_pressed = meta
	input_key.shift_pressed = shift
	input_key.command_or_control_autoremap = command_or_control_autoremap
	
	shortcut.events = [input_key]
	
	menu.add_item(label, id)
	menu.set_item_shortcut(menu.get_item_index(id), shortcut, true)


func _on_popup_menu_item_pressed(id: int) -> void:
	print(id)
	match id:
		MENU_COPY, MENU_PASTE:
			print("TEST")
		CustomMenuItems.MENU_MOVE_LINE_UP:
			print("Moving up!")