pfSense

Mount image rw during changes

Cleanup the tab format of the system user/group/server management pages.
The edges were square instead of rounded like most pfSense pages. Also
make sure tabs and cancel buttons are present in the add privilege and
add certificate pages.

Rework most of the OpenVPN support. The interfaces have been updated to
not use the pkg system and the configuration has been migrated to an
openvpn prefix. The centralized user and certificate manager is now used
to support the openvpn configurations. Most of the files removed in this...

Add a certificate list to the user object that can be managed using the ca
and user manager screens.