Support updated login and sign pages and remove support for older stuff
With this update, it seems there is no obvious container class available
that we can copy to get some default formatting, so this just adds
a text and background color in the CSS directly. It also shortens nummer
to nr in the table headers, since otherwise it did not fit (and I did
not feel like figuring out the CSS to make it fit).
This also removes a bunch of the old code that should hopefully no
longer be needed at all.
Try longer to find a login form
It seems at least the login page can be very slow, and 5 seconds is often not
enough to see the login form appear.
Add debug log line
Bump version to 2.3.0 and update changelog
