user: Fix variable replacement for %{ticket.user}

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

Update class.mailparse.php function splitHeaders

Reviewed-By: Peter Rotich & Jared 

Instead, previously, a maxlength of zero effectively disabled the field,
because it prevented any user input into the field.

function splitHeaders updated in order to correctly parse mail header lines
starting with tabs

pipe: Decode address lists names after parsing emails

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

Otherwise, if a decoded email name has a comma in it, for instance

From: =?utf-8?B?RnJ5ZGVubHVuZCBIeW3DuGxsZXIsIEJldHRpbmE=?=
    <bettina.frydenlundhymoller@domain.com>

The address list will be parsed incorrectly since the comma has an ambiguous
significance. Usually, the personal name would be quoted; however, since it
is encoded, there is no need to quote it.

Fix munging of linked external images

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

Previously, the display of the button was incorrect and more than one button
might have been displayed.

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>