.. the side bar, bottom bar and related buttons were still
following a skeuomorphic design that has long since
fallen into disuse.
.. now have a more muted feel with hover/press colors active
on mouse events.
.. moved the whatsthis button to the far right since this
is quite a common placement in other apps.
.. it is noticeable how we use many many different schemes
for hover/pressed colors across the UI- at some point
this should be unified.
.. also deprecated the segmentcontrol.