Include all validation erors

Unpack user data for filtering purposes for staff created tickets

- 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.