firstboot: Add new help menu to firstboot navbar

- Refactor the help menu into a django template include.

- Show help menu if user is logged in, instead of after completing firstboot.

Closes: #1517

Signed-off-by: Joseph Nuthalapati <njoseph@riseup.net>
[sunil@medhas.org Rename help-menu.inc to help-menu.inc]
[sunil@medhas.org Use user.is_authenticated instead of another variable]
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>
2 jobs for master in 13 minutes and 28 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Test
passed #327616
run-unit-tests

00:05:53

31.55%
 
  Package
passed #327617
build-debian-package

00:07:35