Every rail panel title uses the command dock's label type and colour,
collapsed or open, instead of three sizes at 30% opacity. Panels answer
hover as the dock trays do, with a blue edge, a soft glow and an accent
title. In the default theme each panel's title and collapse button sit
19px from its edge; Context's toggle no longer shrinks beside the radio
button. The cyber theme keeps its own colours and insets.
