### 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)

OS::get_singleton()->move_to_trash(p_pkg_path);
	
	args.push_back("productbuild");
	args.push_back("--component");
	args.push_back(p_app_path_name);
	args.push_back("/Applications");
	String ident = p_preset->get("codesign/installer_identity");
	if (!ident.is_empty()) {
		args.push_back("--timestamp");
		args.push_back("--sign");
		args.push_back(ident);
	
	args.push_back("--quiet");
	args.push_back(p_pkg_path);
	String str;
	Error err = OS::get_singleton()->execute("xcrun", args, &str, nullptr, true);
	if (err != OK) {
		add_message(EXPORT_MESSAGE_ERROR, TTR("PKG Creation"), TTR("Could not start productbuild executable."));
		return err;
	
	bose("productbuild returned: " + str);
	if (str.find("productbuild: error:") != -1) {
		add_message(EXPORT_MESSAGE_ERROR, TTR("PKG Creation"), TTR("`productbuild` failed."));
		return FAILED;
	
	return OK;
Error EditorExportPlatformMacOS::_create_dmg(const String &p_dmg_path, const String &p_pkg_name, const String &p_app_path_name) {
	List<String> args;
	if (FileAccess::exists(p_dmg_path)) {
		OS::get_singleton()->move_to_trash(p_dmg_path);