Adds screensizes to be used as shorthand in class-names
smaller screens will shift from row to column flex directions
size-specific span classes for explicit responsive columns
action menu on tables now works regardless of scroll position
dashboard header scrolls horizontally rather than growing the width of the whole page
TopLevelMenu spans full width of viewport on mobile now
secondary side-bar is now a dropdown on mobile
tables scroll internally so that they don't break the page layout
Login page is now a single column with no image