Patch Notes: Smoother Overworld travel

Fewer freezes while you travel

When you come down from the Overworld, the grass around you no longer freezes the game while it grows back.
Crossing into a new region (desert, mountains, swamp, snow) no longer stalls the game while its ground is prepared.
The first time you take a hit, the blood on your screen no longer causes a freeze.
Long journeys hitch less often overall: the grass, the snow on the ground and the weather now create far less
garbage, so the game stops much less often to clean it up.

At the edge of a snowline, grass is now buried by snow on the same slopes the snow is drawn on.

OW-HITCH: the Overworld's hitches, measured in the real game and taken out by @Lattymoy in #1107
OW-HITCH follow-up: main's deploy green again - the ground sets made beside the build by @Lattymoy in #1109
OW-HITCH follow-up 2: main's deploy green - perf7's breather pin by @Lattymoy in #1110

Full Changelog: app-v0.1.10454...app-v0.1.10461