Fix replay selections in replays menu

When the '!' toggle in the replay menu was moved to the top, the menu
IDs for replays themselves were incorrectly offset.

This is meant to go with commit bdb22e8b57 (fix saved/completed games
toggle option in replay listing).
Really future-proof logo sizes

Turns out the network play main menu was using fixed sizes set in the
interface's master header file instead of the true logo sizes.

This replaces commit 3107914369 (future-proof logo sizes) and commit
edae76898e (future-proof logo sizes for network menu).
Rename this branch DynaHack, wind back version to 0.5.0

This commit requires a clean build.

This branch has come a long way from merely being a port of UnNetHack's
gameplay onto NitroHack, pulling in selected changes from NetHack4,
GruntHack and K-Mod, with no small amount of original work adapting
patches, fixing decade-old bugs no other variants have fixed before and
working on new features.

The version number has been lowered from NitroHack's 4.0.4 to better
reflect the completeness and polish of this game; this commit is not a
release.

Internal path and library names have been preserved to make navigating
code history easier.

A new README file will come in a future commit.
All new README for DynaHack

For now this refers to "NitroHack" as the GitHub project page; that will
change once I have the chance to rename the repo.