### 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
mode_thumbnails->set_icon(theme_cache.mode_thumbnails);
	mode_list->set_icon(theme_cache.mode_list);
	if (is_layout_rtl()) {
		dir_prev->set_icon(theme_cache.forward_folder);
		dir_next->set_icon(theme_cache.back_folder);
	} else {
		dir_prev->set_icon(theme_cache.back_folder);
		dir_next->set_icon(theme_cache.forward_folder);
	}
	dir_up->set_icon(theme_cache.parent_folder);
	refresh->set_icon(theme_cache.reload);
	favorite->set_icon(theme_cache.favorite);
	show_hidden->set_icon(theme_cache.toggle_hidden);
	fav_up->set_icon(theme_cache.favorites_up);
	fav_down->set_icon(theme_cache.favorites_down);
}
void EditorFileDialog::_favorite_selected(int p_idx) {