DOT in Health Bars

Hey folks,

Here's a little quality of life tweak that's coming in the next Shattered Pixel Dungeon update. Health bars (enemy and player) will now visually indicate the amount of incoming damage over time by darkening part of their area. I'm making this change to go along with some other additions coming in the next update that will really benefit from being able to see total DOT at a glance.

This works with most sources of damage over time in the game, including ones with some randomness like burning and bleeding. When RNG is involved the amount of darkened HP can go up or down, but I've done some tweaking behind the scenes to make this less pronounced than you might expect.