This reverts commit e4e8e26f.

This one is used more frequently and also expected when one
clicks on a link that says `Certificates'.

fix https://github.com/opnsense/core/commit/b79592582e0d1fb86343867468f09fee8ca3c8af#commitcomment-10707586

oops... broke the header links, fixed it so it should work for both the status page and the default header.

* Do not patronise the user about advanced settings.  The user should
  know what she's doing.  ;)

* Hide the tabs page by moving it from .php to .inc -- web server acces
  to this file extensions is forbidden.  Tabs do not have authentication
  and that's bad if left untreated...

A human read and cleaned up all inappropriate occurances of 'pfSense' and 'pfsense'., (e.g. this was not an automated find/replace, but instead, a careful pass through the code.)
Signed-off-by: Isaac (.ike) Levy <ike@blackskyresearch.net>

Related to: #136