* enhancement: added contact info/comment field for each tunnel connection.
Allows for a short comment or an email address so you can remember who to contact for each tunnel.
The field is optional and does not need to be filled out to get a tunnel connection up.
Also cleaned up some of the layout on the tunnel pages and hopefully made it a bit easier to tell what is what.
Fixes#457
* added `maxlength='50'` to the comment/contact field.
50 characters should be enough for an email address or a short comment.
* Allow for spaces in the Tunnel contact/comment field