### 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.
main_editor_button_hb = memnew(HBoxContainer);
	title_bar->add_child(main_editor_button_hb);
	
	debug_menu = memnew(PopupMenu);
	debug_menu->set_name(TTR("Debug"));
	main_menu->add_child(debug_menu);
	settings_menu = memnew(PopupMenu);
	settings_menu->set_name(TTR("Editor"));
	main_menu->add_child(settings_menu);
	ED_SHORTCUT_AND_COMMAND("editor/editor_settings", TTR("Editor Settings..."));
	ED_SHORTCUT_OVERRIDE("editor/editor_settings", "macos", KeyModifierMask::META + Key::COMMA);
	settings_menu->add_shortcut(ED_GET_SHORTCUT("editor/editor_settings"), SETTINGS_PREFERENCES);
	settings_menu->add_shortcut(ED_SHORTCUT("editor/command_palette", TTR("Command Palette..."), KeyModifierMask::CMD_OR_CTRL | KeyModifierMask::SHIFT | Key::P), HELP_COMMAND_PALETTE);
	settings_menu->add_separator();
	editor_layouts = memnew(PopupMenu);
	editor_layouts->set_name("Layouts");
	editor_layouts->set_auto_translate(false);
	settings_menu->add_child(editor_layouts);
	editor_layouts->connect("id_pressed", callable_mp(this, &EditorNode::_layout_menu_option));
	settings_menu->add_submenu_item(TTR("Editor Layout"), "Layouts");
	settings_menu->add_separator();
	ED_SHORTCUT_AND_COMMAND("editor/take_screenshot", TTR("Take Screenshot"), KeyModifierMask::CTRL | Key::F12);
	ED_SHORTCUT_OVERRIDE("editor/take_screenshot", "macos", KeyModifierMask::META | Key::F12);
	settings_menu->add_shortcut(ED_GET_SHORTCUT("editor/take_screenshot"), EDITOR_SCREENSHOT);
	settings_menu->set_item_tooltip(-1, TTR("Screenshots are stored in the Editor Data/Settings Folder."));
#ifndef ANDROID_ENABLED
	ED_SHORTCUT_AND_COMMAND("editor/fullscreen_mode", TTR("Toggle Fullscreen"), KeyModifierMask::SHIFT | Key::F11);
	ED_SHORTCUT_OVERRIDE("editor/fullscreen_mode", "macos", KeyModifierMask::META | KeyModifierMask::CTRL | Key::F);
	settings_menu->add_shortcut(ED_GET_SHORTCUT("editor/fullscreen_mode"), SETTINGS_TOGGLE_FULLSCREEN);
#endif