[Feature] List all bills where a user is ower

[Ezwen]

Currently it's easy to list all bills where a given user is the one paying: you just have to click on the user in the sidebar list, and these bills are shown.

However, I believe there is no way to list all bills where a given user is part of the owers. This would be really helpful for a user to better understand balance changes over time, especially in large projects.

[MYanello]

This is actually the opposite in the moneybuster app it seems. So maybe sort of a workaround would be to use the app for now?