Save commit message when switching between views and domains

[PavelLaptev]

During my work, I make notes in the commit box, but when I switch between views and domains, I lose the notes I wrote. Expected behavior is that the text I wrote will stay in the commit box until I delete it.

https://github.com/gitbutlerapp/gitbutler/assets/18498712/c53a9614-97bb-4fcb-a9b9-26e148174584