### 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)

_add_assets_to_project(p_preset, project_file_data, assets);
	String project_file_name = dest_dir + binary_name + ".xcodeproj/project.pbxproj";
	{
		Ref<FileAccess> f = FileAccess::open(project_file_name, FileAccess::WRITE);
		if (f.is_null()) {
			ERR_PRINT("Can't write '" + project_file_name + "'.");
			return ERR_CANT_CREATE;
		};
		f->store_buffer(project_file_data.ptr(), project_file_data.size());
	}
#ifdef MACOS_ENABLED
	{
		if (ep.step("Code-signing dylibs", 2)) {
			return ERR_SKIP;
		}
		Ref<DirAccess> dylibs_dir = DirAccess::open(dest_dir + binary_name + "/dylibs");
		ERR_FAIL_COND_V(dylibs_dir.is_null(), ERR_CANT_OPEN);
		CodesignData codesign_data(p_preset, p_debug);
		err = _walk_dir_recursive(dylibs_dir, _codesign, &codesign_data);
		if (err != OK) {
			add_message(EXPORT_MESSAGE_ERROR, TTR("Code Signing"), TTR("Code signing failed, see editor log for details."));
			return err;
		}
	}
	if (export_project_only) {
		return OK;
	}
	if (ep.step("Making .xcarchive", 3)) {
		return ERR_SKIP;
	}