Revert "Use symbols instead of strings in order clause"
Breaks 1.9.3 compat

This reverts commit 09a2d9e12c56dc0358901fd3aea2684ca0d27b0c.
clarify remove comments in front of email lines
BUGFIX: couldn't upload backup on OSX

--B is not a valid df option on OSX
BUGFIX: Don't include deleted topics in activity. Deleted posts are OK.
FEATURE: better UX when backing-up the site

Users won't be prompted whenever the site goes into read-only mode.
Instead, a banner will be shown at the top of every pages.

Also, the browser won't automatically reload whenever read-only mode is
disabled. This really was bad UX.
add option to override user attributes from SSO payload

add an external_username attribute for username from SSO payload

repair the field name in SingleSignOnRecord migration

move setting of external_username for sso to controller

add settings toggle to override username/email from SSO payload

fix changing of external username after override toggle

complete tests and logic for sso override

add some extra context to username override option

add external_email and external_name to single sign on record

add setting for name override from SSO payload

complete override with stored external_email and external_name

add missing checks to tests

remove an unneeded describe block