I have successfully created a custom: button card that shows my window sensors when they are ‘on’ or ‘off’ as green or red flashing depending on this state. Sometimes the sensors go offline (unavailable) which is annoying, but also misleading when I check my dashboard. I want to be able to show the unavailable state as a different colour, so that I can quickly view my sensors and understand if I should be concerned about whether they are open or closed or just disconnected. Please can I have some assistance?