### 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)

command_line_strings.push_back("--xr_mode_openxr");
	} else { 
		command_line_strings.push_back("--xr_mode_regular");
	}
	bool immersive = p_preset->get("screen/immersive_mode");
	if (immersive) {
		command_line_strings.push_back("--use_immersive");
	}
	bool debug_opengl = p_preset->get("graphics/opengl_debug");
	if (debug_opengl) {
		command_line_strings.push_back("--debug_opengl");
	}
	if (command_line_strings.size()) {
		r_command_line_flags.resize(4);
		encode_uint32(command_line_strings.size(), &r_command_line_flags.write[0]);
		for (int i = 0; i < command_line_strings.size(); i++) {
			print_line(itos(i) + " param: " + command_line_strings[i]);
			CharString command_line_argument = command_line_strings[i].utf8();
			int base = r_command_line_flags.size();
			int length = command_line_argument.length();
			if (length == 0) {
				continue;
			}
			r_command_line_flags.resize(base + 4 + length);
			encode_uint32(length, &r_command_line_flags.write[base]);
			memcpy(&r_command_line_flags.write[base + 4], command_line_argument.ptr(), length);
		}
	}
}
Error EditorExportPlatformAndroid::sign_apk(const Ref<EditorExportPreset> &p_preset, bool p_debug, const String &export_path, EditorProgress &ep) {