### 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.
file->set_current_path(scene->get_scene_file_path());
			};
			file->set_title(TTR("Pick a Main Scene"));
			file->popup_file_dialog();
		} break;
		case HELP_SEARCH: {
			emit_signal(SNAME("request_help_search"), "");
		} break;
		case HELP_COMMAND_PALETTE: {
			command_palette->open_popup();
		} break;
		case HELP_DOCS: {
			OS::get_singleton()->shell_open(VERSION_DOCS_URL "/");
		} break;
		case HELP_QA: {
			OS::get_singleton()->shell_open("https:godotengine.org/qa/");
		} break;
		case HELP_REPORT_A_BUG: {
			OS::get_singleton()->shell_open("https:github.com/godotengine/godot/issues");
		} break;
		case HELP_COPY_SYSTEM_INFO: {
			String info = _get_system_info();
			DisplayServer::get_singleton()->clipboard_set(info);
		} break;
		case HELP_SUGGEST_A_FEATURE: {
			OS::get_singleton()->shell_open("https:github.com/godotengine/godot-proposals#readme");
		} break;
		case HELP_SEND_DOCS_FEEDBACK: {
			OS::get_singleton()->shell_open("https:github.com/godotengine/godot-docs/issues");
		} break;