Add tabindex to login screen
When on the loginscreen there were no tabindex' defined.
I made it follow the login, password, open id, stay logged in and finally the login button (therefor skipping the "lost password" link.
However, the checkbox autologin is now set to true as default since check_box_tag could not set any options of not both value and checked status was defined. If it should be false as default I can ofcourse fix that to.
Note that this was mostly a test on how to make patches and therefor I did one for the thing that was an easy fix for not that big a problem. :)
Patched from r3092.