Suggestion: Allow creation of folders to group presets

It would be nice to be able to create folders in the presets so that I could group together similar resolutions. For example, I might want a couple presets not in a folder that are my most commonly used, but then I might want multiple mobile device presets in a Mobile folder for when I'm testing. When selecting the folders could initially show as collapsed and then expand when clicked on to reveal all the values in that folder.