- Give the side panels one look. Every panel title now uses the command dock's
  label type in a brighter colour; a panel's edge and title light up on hover,
  as the dock's trays do; and in the default theme each collapse button sits
  19px from its panel's edge (plus the scrollbar's width in an open, scrolling
  panel where the system always shows scrollbars) (asturksever, #1466).