Fix for #1411 and #1407. Corrected the malreferenced variables, was not able to verify #1407 as being fixed since there wasn't clear instructions on how to replicate.

Update message pinning to show up on the tab list with a few options to allow/disallow it and whether to allow anyone to pin messages

This change also alters how edits are displayed both for sequential
and non-sequential messages.

See #1357

Added user method for searching users from same domain

Note that this also makes a minor tweak to scope of "if description"
check in admin.html, that is more correct.

This should cut down on the redundant i18nDescription declarations
by allowing developers to utilize the default key + "_Description"
convention in the i18n/ files for settings and setting groups

Example: setting LDAP_Enable will look for the LDAP_Enable_Description
key unless it's explicitly overriden.