Comment 2 for bug 1909144

My proposed fix is at:

https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/mccanna/lp1909144_login_tabbing

This adds autofocus to the user name field as well as improving the tab order.

When testing, be sure to test both the login modal (by clicking on My Account on the upper right) as well as the embedded login form at /eg/opac/login