### 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)

ent_f->store_line("</dict>");
				ent_f->store_line("</plist>");
			 else {
				add_message(EXPORT_MESSAGE_ERROR, TTR("Code Signing"), TTR("Could not create entitlements file."));
				err = ERR_CANT_CREATE;
			
			if ((err == OK) && helpers.size() > 0) {
				ent_f = FileAccess::open(hlp_ent_path, FileAccess::WRITE);
				if (ent_f.is_valid()) {
					ent_f->store_line("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
					ent_f->store_line("<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">");
					ent_f->store_line("<plist version=\"1.0\">");
					ent_f->store_line("<dict>");
					ent_f->store_line("<key>com.apple.security.app-sandbox</key>");
					ent_f->store_line("<true/>");
					ent_f->store_line("<key>com.apple.security.inherit</key>");
					ent_f->store_line("<true/>");
					ent_f->store_line("</dict>");
					ent_f->store_line("</plist>");
				 else {
					add_message(EXPORT_MESSAGE_ERROR, TTR("Code Signing"), TTR("Could not create helper entitlements file."));
					err = ERR_CANT_CREATE;
				
			
		
		if ((err == OK) && helpers.size() > 0) {
			Ref<DirAccess> da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
			for (int i = 0; i < helpers.size(); i++) {
				String hlp_path = helpers[i];
				err = da->copy(hlp_path, tmp_app_path_name + "/Contents/Helpers/" + hlp_path.get_file());