fixed widget initialization

Author: Roberto De Ioris

Source/UnrealEnginePython/Private/Slate/UEPySPythonShelf.cpp

@@ -159,6 +159,7 @@ static int ue_py_spython_shelf_init(ue_PySPythonShelf *self, PyObject *args, PyO
 	}
 
 	new(&self->s_compound_widget.s_widget.s_widget) TSharedRef<SWidget>(module.Get().CreateAssetPicker(asset_picker_config));
+	ue_py_register_swidget((SWidget *)&self->s_compound_widget.s_widget.s_widget.Get(), (ue_PySWidget *)self);
 	return 0;
 }
 

Source/UnrealEnginePython/Private/Slate/UEPySlate.h

@@ -96,6 +96,8 @@ template<typename T> ue_PySWidget *py_ue_new_swidget(TSharedRef<SWidget> s_widge
 
 	ue_py_setup_swidget(ret);
 
+	ret->s_widget = s_widget;
+
 	ue_py_register_swidget(&s_widget.Get(), ret);
 	return ret;
 }