Patch 0.9.20 : Interface improvements

Improvements

• Added sounds to many interface elements.
  • Buttons have hover and click sounds.
  • Cards in hand have shift-up and play sounds.
  • Other clickable elements w/o hovered state have click sounds only.
  • Added Interface Volume to Settings (which affects all of those sounds).

• Improved map between battles.
  • The blinking highlight is larger, and also scales in size.
  • Unavailable path becomes half-transparent.
  • Pathways don't blink any more (that was more distracting than helpful).

• Added damage numbers.
  • Mostly for more ARPG feel.

• Pool overflow animation looks more "angry" now.
  • So it's clearer that something undesirable happened.
  • That's an attempt to help players learn to avoid overflowing mana pool.

• Victory and Defeat screens have the usual 3 buttons on the top-right.
  • That is mostly so you can see your final deck after run ended.

Bugfixes

• Fixed predicted mana gain for cards that damage hero, when Martyrdom is active.