### Tested versions

Caused by [0d6300d269b818e6c3d3ea9cbc592480103aa6d0] Fix folder color not showing up in file dialogs
https://github.com/godotengine/godot/pull/84837
(git bisection)

### System information

Godot v4.3.dev (6faa5c6dc) - Fedora Linux 39 (Workstation Edition) - Wayland - Vulkan (Forward+) - dedicated AMD Radeon RX Vega (RADV VEGA10) () - AMD Ryzen 7 5800X 8-Core Processor (16 Threads)

### Issue description

When opening the export path, it results in a black popup.

![image](https://github.com/godotengine/godot/assets/270928/d67dee6a-f1e1-4bf3-8a3f-419554269f4a)


### Steps to reproduce

1. Open export settings
2. Add an export target
3. Try to select an export path

### Minimal reproduction project (MRP)

n/a
vsc->add_child(fav_vb);
	fav_vb->set_custom_minimum_size(Size2(150, 100) * EDSCALE);
	fav_vb->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	HBoxContainer *fav_hb = memnew(HBoxContainer);
	fav_vb->add_child(fav_hb);
	l = memnew(Label(TTR("Favorites:")));
	l->set_theme_type_variation("HeaderSmall");
	fav_hb->add_child(l);
	fav_hb->add_spacer();
	fav_up = memnew(Button);
	fav_up->set_theme_type_variation("FlatButton");
	fav_hb->add_child(fav_up);
	fav_up->connect("pressed", callable_mp(this, &EditorFileDialog::_favorite_move_up));
	fav_down = memnew(Button);
	fav_down->set_theme_type_variation("FlatButton");
	fav_hb->add_child(fav_down);
	fav_down->connect("pressed", callable_mp(this, &EditorFileDialog::_favorite_move_down));
	favorites = memnew(ItemList);
	fav_vb->add_child(favorites);
	favorites->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	favorites->connect("item_selected", callable_mp(this, &EditorFileDialog::_favorite_selected));
	VBoxContainer *rec_vb = memnew(VBoxContainer);
	vsc->add_child(rec_vb);
	rec_vb->set_custom_minimum_size(Size2(150, 100) * EDSCALE);
	rec_vb->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	recent = memnew(ItemList);
	recent->set_allow_reselect(true);
	rec_vb->add_margin_child(TTR("Recent:"), recent, true);
	recent->connect("item_selected", callable_mp(this, &EditorFileDialog::_recent_selected));
	VBoxContainer *item_vb = memnew(VBoxContainer);