### 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
int current = p_item;
	if (current < 0 || current >= item_list->get_item_count()) {
		return;
	}
	Dictionary d = item_list->get_item_metadata(current);
	if (!d["dir"]) {
		file->set_text(d["name"]);
		_request_single_thumbnail(get_current_dir().path_join(get_current_file()));
		
		set_ok_button_text(TTR("Open"));
	} else if (mode == FILE_MODE_OPEN_DIR || mode == FILE_MODE_OPEN_ANY) {
		file->set_text("");
		set_ok_button_text(TTR("Select This Folder"));
	}
	get_ok_button()->set_disabled(_is_open_should_be_disabled());
}
void EditorFileDialog::_multi_selected(int p_item, bool p_selected) {
	int current = p_item;
	if (current < 0 || current >= item_list->get_item_count()) {
		return;
	}
	Dictionary d = item_list->get_item_metadata(current);
	if (!d["dir"] && p_selected) {
		file->set_text(d["name"]);
		_request_single_thumbnail(get_current_dir().path_join(get_current_file()));
	}
	get_ok_button()->set_disabled(_is_open_should_be_disabled());
}
void EditorFileDialog::_items_clear_selection(const Vector2 &p_pos, MouseButton p_mouse_button_index) {