Try to create HUDs in the correct initial state instead of
creating empty and trying to change on the very next tick, which
could lead to HUDs arriving out of order and desyncing.
Swap it out with the breath bar, since the breath bar won't be
displaying most of the time, so we can afford to not read what an
item is until we come up for air to look at it.
Also, "eggcorn" is a single word.
- Inventory screen is now no longer game-interactive, and serves
as purely an "about" screen.
- Move the HUD components out of inv mod and into hud mod.
- Separate player setup mod for static physical limitations like
step height, inv size, etc.
