Dummy widget with custom icon

Hello,

I have created a custom icon for an item where I did not found a matching icon in the provided icon sets. I stored the icon in /etc/openhab2/icons/classic and used the corresponding icon name as category in the item definition. The icon is finally correctly shown in the item configuration of Paper UI.

How can I use the custom icon in a Dummy Widget used to show the item value on HABPanel?