Hello,
Thanks for your widget. I made one for my netatmo, but I like yours a lot better.
As for the option to hide an item, the easiest solution I found was to add a checkbox config item that can be used to hide or display something. In the “now playing” widget I did for Onkyo players, I added a checkbox to hide the cover art image, for those players that don’t support it. Take a look at the json from this thread, specifically the now playing widget.
Hope that helps, and thanks again for the widget.