### Tested versions

Godot Engine v4.2.stable.official.46dc27791

### System information

Windows 10

### Issue description

When exporting to web, Godot fails with this error in the console:

> scene/main/window.cpp:884 - Attempting to make child window exclusive, but the parent window already has another exclusive child. This window: /root/@<!-- -->EditorNode@<!-- -->17120/@<!-- -->Panel@<!-- -->13/@<!-- -->ProjectExportDialog@<!-- -->559/@<!-- -->VBoxContainer@<!-- -->137/@<!-- -->AcceptDialog@<!-- -->411, parent window: /root/@<!-- -->EditorNode@<!-- -->17120/@<!-- -->Panel@<!-- -->13/@<!-- -->ProjectExportDialog@<!-- -->559, current exclusive child window: /root/@<!-- -->EditorNode@<!-- -->17120/@<!-- -->Panel@<!-- -->13/@<!-- -->ProjectExportDialog@<!-- -->559/@<!-- -->ProgressDialog@<!-- -->17444

![a](https://github.com/godotengine/godot/assets/2000051/bf9d22aa-d3fe-4e11-bff6-c387e740fe90)

This happens for newly created empty projects.


### Steps to reproduce

1. Open the attached project (or create a new project).
2. Project->Export->Export All
3. Observe the console error.  No output files are generated.


### Minimal reproduction project (MRP)

[export_test.zip](https://github.com/godotengine/godot/files/13574810/export_test.zip)

ERR_FAIL_INDEX_V(p_index, devices.size(), "");
	MutexLock lock(device_lock);
	return devices[p_index].name;
}
String EditorExportPlatformIOS::get_option_tooltip(int p_index) const {
	ERR_FAIL_INDEX_V(p_index, devices.size(), "");
	MutexLock lock(device_lock);
	return "UUID: " + devices[p_index].id;
}
bool EditorExportPlatformIOS::is_package_name_valid(const String &p_package, String *r_error) const {
	String pname = p_package;
	if (pname.length() == 0) {
		if (r_error) {
			*r_error = TTR("Identifier is missing.");
		}
		return false;
	}
	for (int i = 0; i < pname.length(); i++) {
		char32_t c = pname[i];
		if (!(is_ascii_alphanumeric_char(c) || c == '-' || c == '.')) {
			if (r_error) {
				*r_error = vformat(TTR("The character '%s' is not allowed in Identifier."), String::chr(c));
			}
			return false;
		}
	}
	return true;
}
#ifdef MACOS_ENABLED
bool EditorExportPlatformIOS::_check_xcode_install() {