Flathub.org states that our app is potentially unsafe: <img width="1426" alt="Screenshot 2023-12-01 at 13 47 10" src="https://github.com/flathub/org.gaphor.Gaphor/assets/96249/81843501-37d7-4033-8a91-19e93ac003d2"> Should we limit access to the home directory only? @danyeaw What do you think?