### 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
if (!p_path.size()) {
		return;
	}
	int pos = MAX(p_path.rfind("/"), p_path.rfind("\\"));
	if (pos == -1) {
		set_current_file(p_path);
	} else {
		String path_dir = p_path.substr(0, pos);
		String path_file = p_path.substr(pos + 1, p_path.length());
		set_current_dir(path_dir);
		set_current_file(path_file);
	}
}
void EditorFileDialog::set_file_mode(FileMode p_mode) {
	mode = p_mode;
	switch (mode) {
		case FILE_MODE_OPEN_FILE:
			set_ok_button_text(TTR("Open"));
			set_title(TTR("Open a File"));
			can_create_dir = false;
			break;
		case FILE_MODE_OPEN_FILES:
			set_ok_button_text(TTR("Open"));
			set_title(TTR("Open File(s)"));