v0.4.4 — keep config.cfg across reinstall; quiet the GNOME not-responding popup

Quality-of-life fixes on top of v0.4.3.

• config.cfg is preserved across reinstalls. The XWAU payload rewrites config.cfg on every (re)install (resetting your current pilot, keybinds, audio, graphics). The installer now snapshots config.cfg before install and restores it afterward, so your settings — including which pilot is active — survive an upgrade/reinstall. (Interim workaround; upstream fix pending.)
• No more "X-Wing Alliance is not responding" popup on first launch. The first launch compiles the DXVK shader cache and briefly makes the window unresponsive; the installer now silences GNOME's Wait/Force-Quit dialog just for the duration of the game (no extra dependency — no gamescope needed).

Get it (no git needed)

curl -fL https://github.com/psoetens/xwau-linux/archive/refs/tags/v0.4.4.tar.gz | tar xz
cd xwau-linux-0.4.4

Prebuilt Windows binaries unchanged from v0.3.0–v0.4.3 (carried forward so this tag is self-contained).