* Fix crash in Ticket::getLastRespondent
* Fix crash is ORM if using a superclass of a relationship from cache. For
  instance, if the cache contains an ObjectThread instance, but a
  TicketThread instance is required in the relationship. In such a case, use
  the cached data, but change this class. This; however, violates the single
  nature of cache entries.
* Fix spurious events appearing after upgrade due to deleted tickets
* Ensure floating content in thread-body divs does not float past the bottom
* Provide an anchor to thread entries
* Show thread entries before events where both have the same timestamp
* Fix double events for collaborator additions
* Credit email sender with collaborator addition
* Fix incorrect rendering of collaborator addition event
* Fix crash on new ticket due to non-static function
* Fix missing sort on sub-query if explicitly declared in QuerySet
* Fix missing parentheses in SQL for ['field__eq' => QuerySet]
* Fix incorrect SQL on compileSelect for models with inherited $meta['table']
* Dynamically adjust relative time client side

And also fix mishap events changing the ticket status

task: Add print support

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

Add multiple sticky bars support
Make scroll-up automated and independent

Conflicts:
	WHATSNEW.md
	include/class.dynamic_forms.php
	include/class.forms.php
	include/class.thread.php
	include/i18n/en_US/help/tips/settings.email.yaml
	include/staff/tickets.inc.php
	scp/tickets.php

orm: Port Ticket class to ORM

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

This is one of the last milestones for osTicket on an ORM. Unfortunately, it
doesn't make any remarkable speed increases at the moment.

The ORM will cache the structure of the underlying tables (fields and such)
in APC, and will needs to ensure such data is purged when the table
structures change.

Conflicts:
	include/class.attachment.php
	include/class.config.php
	include/class.forms.php
	include/class.orm.php
	scp/css/scp.css

Feature/tasks stabilize

forms: Add ability to delete properties form

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

file: Allow different names for duplicated content

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

This adds ability to delete properties on list deletion

This patch (which needs further development), introduces an extra field to
the %attachment table to store a file's name, in the event that two files
with the same content are stored in the database with differing names. In
such a case, the name is stored in the %attachment table. This allows the
attachment to specify a different name each time the same file is attached
to something in the system.

forms: Retire old columns from %form_field table

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

* Rename config var enable_html_thread to enable_richtext
* Copy config var name_format to agent_name_format and client_name_format
  and delete it

This stems from a bug not clearing the org_id when removing organizations