- Remove Client form
- Provide name and email fields for cases where use is not selected (JS
issues)

Add update routine
Add updated date getter

Add ability to change ticket owner on ticket view
Add get last updated date to user class

We do not support multiple emails per user at the moment.  We'll revisit the
issue once such support is added.

Fix odd CSS error

orm: Fix detection of statement failure
orm: Fix type detection of InstrumentedList::add
mysqli: Set object-level character set

without required, internal contact field

Fixes osTicket/osTicket-1.8#203

Fixes #198

Previously, html-like content would have to be run through Format::htmlchars
before being passed to Format::sanitize, because things that looked like
invalid html content would be removed.

A mail client may indicate a header parameter (such as Novell Groupwise,
which may add something like

Content-Disposition: inline; modification-time: "Thu ..."

) Previously, the system would not consider the content to be a candidate
for the email body, because it has parameters to the content-disposition
header.

This patch will still consider the part to be a candidate for the body if
the mime types match and no filename is found in the content-disposition
parameters.

Fixes #191

There's a unique index on %user_email.address, so there's no need to create
an index on %ticket.email when matching up records.

And avoid double encoding email bodies if html thread is not enabled