### 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.
dock_select->queue_redraw();
			dock_select_rect_over_idx = nrect;
		}
		if (nrect == -1) {
			return;
		}
		Ref<InputEventMouseButton> mb = me;
		if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && mb->is_pressed() && dock_popup_selected_idx != nrect) {
			Control *dock = dock_slot[dock_popup_selected_idx]->get_current_tab_control();
			if (dock) {
				dock_slot[dock_popup_selected_idx]->remove_child(dock);
			}
			if (dock_slot[dock_popup_selected_idx]->get_tab_count() == 0) {
				dock_slot[dock_popup_selected_idx]->hide();
			} else {
				dock_slot[dock_popup_selected_idx]->set_current_tab(0);
			}
			dock_slot[nrect]->add_child(dock);
			dock_popup_selected_idx = nrect;
			dock_slot[nrect]->set_current_tab(dock_slot[nrect]->get_tab_count() - 1);
			dock_slot[nrect]->set_tab_title(dock_slot[nrect]->get_tab_count() - 1, TTRGET(dock->get_name()));
			dock_slot[nrect]->show();
			dock_select->queue_redraw();
			_update_dock_containers();
			_edit_current();
			_save_editor_layout();
		}
	}
}
void EditorNode::_dock_popup_exit() {