### Godot version

4.1.dev (dc625bcbfc5b587ba8867481ee7a1f6a567c25d0)

### System information

Mageia 9, Linux

### Issue description

When importing a project in current `master`, the following error is raised for each asset that gets imported:
```
Attempting to parent and popup a dialog that already has a parent.
```

It seems to be raised once per asset, caused by the progress dialog.

CC @bruvzg

### Steps to reproduce

- Import a new project in Godot that contains importable assets, e.g. https://github.com/RPicster/godot4-demo-desert-light

### Minimal reproduction project

See above.
}
			if (accept) {
				accept->queue_free();
			}
			if (save_accept) {
				save_accept->queue_free();
			}
			editor_data.save_editor_external_data();
			FileAccess::set_file_close_fail_notify_callback(nullptr);
			log->deinit(); 
			editor_data.clear_edited_scenes();
		} break;
		case NOTIFICATION_READY: {
			{
				_initializing_plugins = true;
				Vector<String> addons;
				if (ProjectSettings::get_singleton()->has_setting("editor_plugins/enabled")) {
					addons = GLOBAL_GET("editor_plugins/enabled");
				}
				for (int i = 0; i < addons.size(); i++) {
					set_addon_plugin_enabled(addons[i], true);
				}
				_initializing_plugins = false;
				if (!pending_addons.is_empty()) {
					EditorFileSystem::get_singleton()->connect("script_classes_updated", callable_mp(this, &EditorNode::_enable_pending_addons));
				}
			}
			RenderingServer::get_singleton()->viewport_set_disable_2d(get_scene_root()->get_viewport_rid(), true);
			RenderingServer::get_singleton()->viewport_set_environment_mode(get_viewport()->get_viewport_rid(), RenderingServer::VIEWPORT_ENVIRONMENT_DISABLED);
			feature_profile_manager->notify_changed();