### 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
list_hb->add_child(item_vb);
	item_vb->set_custom_minimum_size(Size2(320, 0) * EDSCALE);
	HBoxContainer *preview_hb = memnew(HBoxContainer);
	preview_hb->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	item_vb->add_child(preview_hb);
	VBoxContainer *list_vb = memnew(VBoxContainer);
	list_vb->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	l = memnew(Label(TTR("Directories & Files:")));
	l->set_theme_type_variation("HeaderSmall");
	list_vb->add_child(l);
	preview_hb->add_child(list_vb);
	
	item_list = memnew(ItemList);
	item_list->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	item_list->connect("item_clicked", callable_mp(this, &EditorFileDialog::_item_list_item_rmb_clicked));
	item_list->connect("empty_clicked", callable_mp(this, &EditorFileDialog::_item_list_empty_clicked));
	item_list->set_allow_rmb_select(true);
	list_vb->add_child(item_list);
	item_menu = memnew(PopupMenu);
	item_menu->connect("id_pressed", callable_mp(this, &EditorFileDialog::_item_menu_id_pressed));
	add_child(item_menu);
	
	preview_vb = memnew(VBoxContainer);
	preview_hb->add_child(preview_vb);
	CenterContainer *prev_cc = memnew(CenterContainer);
	preview_vb->add_margin_child(TTR("Preview:"), prev_cc);
	preview = memnew(TextureRect);
	prev_cc->add_child(preview);
	preview_vb->hide();
	file_box = memnew(HBoxContainer);