x11-wm/hyprland: backport some fixes
- Add misc:swallow_exception_regex to work around patch conflict
- Avoid misc:enable_swallow crash if misc:swallow_regex is unset
- Avoid missing systemctl disabling dbus-update-activation-environment
(cherry picked from commit 9e6312e21dc41631d22fbeaf6ec62d86d022db5d)