Avoid an uninitialized warning
Preserve the RT generated "Logged in as..." menu for Bitcard/OpenID users

These users are also forced to the Public view but have actual accounts
unlike a true guest public user.
Avoid an uninitialized warning on initial page load
Rework the bug report page with a split layout and clearer instructions

Public guest users are pointed more prominently at a clickable (but
bot-protected) mailto link.  Bitcard is still mentioned, but is the
second option rather than the first.

The split layout helps emphasize the instructions vs. the form or method
of reporting a bug.  Much like RT's side by side ticket create layout,
the split is reactive and will collapse to a single column for narrow
browsers.