An interesting feature to add (at least for me it would be useful) might be to have the widget show all cards in a board, instead of just from a single list. An intuitive way to fit this into the UI I believe would be to have an "All lists" option in the current lists menu when setting up the widget.
Also, I checked and the Trello API does have a call for getting all cards in a board (https://developers.trello.com/advanced-reference/board#get-1-boards-board-id-cards), so this shouldnt be to hard on an addition.
An interesting feature to add (at least for me it would be useful) might be to have the widget show all cards in a board, instead of just from a single list. An intuitive way to fit this into the UI I believe would be to have an "All lists" option in the current lists menu when setting up the widget.
Also, I checked and the Trello API does have a call for getting all cards in a board (https://developers.trello.com/advanced-reference/board#get-1-boards-board-id-cards), so this shouldnt be to hard on an addition.