It would be nice to have a way to group (and hide) lists that relate to the same topic. I now use a number to sort them together (All lists starting with 1 relate to private, all with 2 relate to clients,....) but it would be good to be able to create a group of lists and hide/show them. That way at work I could just work from 4 or 5 "work" lists and at home,... I could hide/show other groups instead of having a cluttered list of lists.