Each dial has it's own refresh but how about one button to refresh all the dial's at the same time?

The drop down menus should be simpler and more aesthetically pleasing. Perhaps use a simple arrow without the black tab. Then when we click the arrow the same layout you have on the menu can be shown but with a slightly transparent background.

Also, allow us to change the color of the toggle for groups - this way we can organize it even further by color coding it.

Otherwise, great extension. This is the only one that allows multiple groups.

Thanks.