Confirmed, starting a preview with th e"Show preview"-button after changing the text of a listbox (e.g.) shows the correct text, but the preview has no close button.
The text does not appear in wysiwyg-preview and is not saved.
Colour can not be customized.
For a simple textcontrol updating the text works, but chnging the colour has no effects, changes are not written to the cpp-file .