Using the style editor, unconventional though it may be, is a nice alternative to testing code commits that wouldn't actually fix anything because all the class headers were space-delimited instead of using a seperator that allows the CSS to select one particular element, like the title name for a file listing, without looking up the :not feature to deselect the header with the exact same .item class (thanks to https://stackoverflow.com/a/16202009 for helping find out how to single that out).