We can now use a widget to show any errors returned by WgerHttpException. This has
to be added on a form-by-form basis, otherwise, the general error handling shows
the results in a modal dialog
The api token toggle is now only visible when showing a custom server, since at
the moment this is the only time when such an auth method makes sense (plus it
keeps the rest of the UI cleaner). The different fields in the screen have been
moved to individual files, to make the structure clearer.
Previously, this was only triggered when logging in to the application. If a user
just opened the app, it would just stop working. We also now always check this min
version and have removed the option from the android manifest file since disabling
this doesn't make much sense and we have many other platforms as well (iOS, flatpak)
The translations are not stored in a synthetic package anymore, but the
files are just copied to a specific folder so it can be more easily imported
Also, flutter_barcode_scanner was replaced by simple_barcode_scanner since
the first hasn't been updated in 3 years and was already causing problems
for some time
