Changed field IDs for new users, duplicate IDs causing issue #65

The 'new user' form reused field IDs from the login page
assuming that they would be unique in the users page. But in jQM
'pages' are just 'divs' inside a big 'page' and must be unique
across the application.
Merge branch 'master' of ds1201.fritz.box:BicBucStriim