### 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.
ADD_PROPERTY(PropertyInfo(Variant::VECTOR2I, "max_size", PROPERTY_HINT_NONE, "suffix:px"), "set_max_size", "get_max_size");
	ADD_GROUP("Content Scale", "content_scale_");
	ADD_PROPERTY(PropertyInfo(Variant::VECTOR2I, "content_scale_size"), "set_content_scale_size", "get_content_scale_size");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "content_scale_mode", PROPERTY_HINT_ENUM, "Disabled,Canvas Items,Viewport"), "set_content_scale_mode", "get_content_scale_mode");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "content_scale_aspect", PROPERTY_HINT_ENUM, "Ignore,Keep,Keep Width,Keep Height,Expand"), "set_content_scale_aspect", "get_content_scale_aspect");
	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "content_scale_factor"), "set_content_scale_factor", "get_content_scale_factor");
	ADD_GROUP("Localization", "");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "auto_translate"), "set_auto_translate", "is_auto_translating");
	ADD_GROUP("Theme", "theme_");
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "theme", PROPERTY_HINT_RESOURCE_TYPE, "Theme"), "set_theme", "get_theme");
	ADD_PROPERTY(PropertyInfo(Variant::STRING, "theme_type_variation", PROPERTY_HINT_ENUM_SUGGESTION), "set_theme_type_variation", "get_theme_type_variation");
	ADD_SIGNAL(MethodInfo("window_input", PropertyInfo(Variant::OBJECT, "event", PROPERTY_HINT_RESOURCE_TYPE, "InputEvent")));
	ADD_SIGNAL(MethodInfo("files_dropped", PropertyInfo(Variant::PACKED_STRING_ARRAY, "files")));
	ADD_SIGNAL(MethodInfo("mouse_entered"));
	ADD_SIGNAL(MethodInfo("mouse_exited"));
	ADD_SIGNAL(MethodInfo("focus_entered"));
	ADD_SIGNAL(MethodInfo("focus_exited"));
	ADD_SIGNAL(MethodInfo("close_requested"));
	ADD_SIGNAL(MethodInfo("go_back_requested"));
	ADD_SIGNAL(MethodInfo("visibility_changed"));
	ADD_SIGNAL(MethodInfo("about_to_popup"));
	ADD_SIGNAL(MethodInfo("theme_changed"));
	ADD_SIGNAL(MethodInfo("dpi_changed"));
	ADD_SIGNAL(MethodInfo("titlebar_changed"));
	BIND_CONSTANT(NOTIFICATION_VISIBILITY_CHANGED);
	BIND_CONSTANT(NOTIFICATION_THEME_CHANGED);
	BIND_ENUM_CONSTANT(MODE_WINDOWED);
	BIND_ENUM_CONSTANT(MODE_MINIMIZED);
	BIND_ENUM_CONSTANT(MODE_MAXIMIZED);
	BIND_ENUM_CONSTANT(MODE_FULLSCREEN);