Miscellaneous fixes

Hi there.

I just saw this app on the F-Droid "store" and I thought that it looked outdated. I, then, sat down perusing the code and with the help of some automated checks, I performed some changes.

Depending on how things go, I may contribute some translations for Brazilian Portuguese (as I have family members that would like to use the app, but they can't speak English).

Please, consider merging this. It would be lovely to also have a new release pushed to F-Droid (and other places too).

Thanks,

Rogério Brito.