V21: Explosions & Fixes

Another small update, the biggest changes being a fix for an easy to trigger, but totally avoidable and concequence free, crash and a mild rework of the start of turn and exploding tiles.

• Fixed a crash if you try to sort your inventory when you have empty slots.
• Fixed stats page not updating with new entries properly until relaunch.
• Fixed pre-v17 saves having issues related to character colours.
• Fixed enemies that are permanently on fire not having their damage reductions count in estimations.
• Added an extra phase before the start of the player turn to allow tiles to rest. This:
  • Visually clarifies the impact of bad tiles.
  • Fixed race conditions with the negative effects of bad tiles.
  • Fixed potentially being able to skip turn effects if you acted on the first frame of the player turn.
• Added a pop sound effect and particle effect when tiles explode.