htmLawed stripped/discarded <div> tags nested inside inline tags such as
<a>. The previous replacement engine would replace <img> tags with <div>
tags and would cause the HTML to be corrupted by htmLawed.

This patch uses <span> tags which have CSS rules to be displayed as
inline-blocks. This should stay truer to the normal sizing and placement of
the original <img> tag.

And use admin-defined site logo

forms: Fixup misleading page after save

Reviewed-By: Peter Rotich <peter@osticket.com>

Allow stylesheet for printing

Reviewed-By: Peter Rotich <peter@osticket.com>

forms: Don't save on validation errors

Reviewed-By: Peter Rotich <peter@osticket.com>

Also, write js and css links to be forcibly reloaded by the browser after
deployment

As suggested by: https://github.com/osTicket/osTicket-1.8/issues/755

Alert on Internal Note

Reviewed-By: Jared Hancock <jared@osticket.com>

Send an alert to assigned staff/team on an internal note even when a ticket is
closed.

bug: "No Alerts" on assignment for teams

Reviewed-By: Jared Hancock <jared@osticket.com>

oops: Fix a few small issues

Reviewed-By: Peter Rotich <peter@osticket.com>

Enhancements

Reviewed-By: Jared Hancock <jared@osticket.com>

Add ability to disable canned responses
Fix team drop down selection
Remove priority escalation setting in SLA page (implementation is on todo
        list)

captcha field without autocomplete

Reviewed-By: Jared Hancock <jared@osticket.com>

oops: Add "size" to allowed API properties for attachments

Reviewed-By: Peter Rotich <peter@osticket.com>

Fix images in new ticket notice to end user

Reviewed-By: Peter Rotich <peter@osticket.com>

Show close date on closed tickets queue

Reviewed-By: Jared Hancock <jared@osticket.com>

Make mail parsing more memory efficient

Reviewed-By: Peter Rotich <peter@osticket.com>

Remove usage of preg_match_all for large strings

bounce: Handle rfc/1892 style bounce notices

Reviewed-By: Peter Rotich <peter@osticket.com>

alerts: Send new note alert to assigned team members

Reviewed-By: Peter Rotich <peter@osticket.com>

Sometimes an MTA may just send back the headers of the original message
rather than the entire original message. Such an email will have a
`text/rfc822-headers` part which will be the complete headers of the
original message.

Without this patch, osTicket will create a new ticket for the bounce message
rather than attaching the new internal note to the existing ticket.

References:
https://tools.ietf.org/html/rfc1892