expand advanced settings if they are modified

[adbenitez]

this helps avoid issues like user changing email address and password and pressing "configure" button without realizing they have custom imap, smpt, etc. settings

this already happened to a friend when I was trying to help them to migrate to a chatmail address, it was really confusing because address was changed and configuration succeed but it took me a while realize that the client was actually connecting to a different IMAP/SMTP server without even using the new set address and password because it was using the manual configuration set in advanced

[github-actions[bot]]

To test the changes in this pull request, install this apk: 📦 app-preview.apk