Data race bug: floating windows could stuck in a corner

- The main discussion thread: https://github.com/nikitabobko/AeroSpace/discussions/1875 - PR from the community: https://github.com/nikitabobko/AeroSpace/pull/1985 - The bad commit: 730ac983342435a30e46c441f54c26e4c5bdda3e (kudos to @fbuetler for bisecting)