### 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)

}
		if (first && is_digit(c)) {
			if (r_error) {
				*r_error = TTR("A digit cannot be the first character in a package segment.");
			}
			return false;
		}
		if (first && is_underscore(c)) {
			if (r_error) {
				*r_error = vformat(TTR("The character '%s' cannot be the first character in a package segment."), String::chr(c));
			}
			return false;
		}
		first = false;
	}
	if (segments == 0) {
		if (r_error) {
			*r_error = TTR("The package must have at least one '.' separator.");
		}
		return false;
	}
	if (first) {
		if (r_error) {
			*r_error = TTR("Package segments must be of non-zero length.");
		}
		return false;
	}
	return true;
}
bool EditorExportPlatformAndroid::is_project_name_valid() const {