This adds functionality to clean expired password reset tokens on cron runs.

tests: Git Conflict Markers

issue: Ticket Filter Does Not Match Regex

perms: Alphabetize Role/Staff Permissions

issue: Wrong Attachment Names

issue: Old Attachment Names

This alphabetizes all Role and Staff Permissions.

This addresses an issue reported on the forums where the ticket filter Rule
option of “Does Not Match Regex” isn’t working properly; instead it works in
reverse.

issue: FAQ & Canned Attachments Dropping

Task Assigned Team Issue:

This addresses an issue where it appeared as though tasks could not be assigned to teams if an agent in the team was not a part of the task's department. The assigment was actually taking place, however, it was not showing up in the Assignee column. Now the form will correctly display the column

This addresses an issue where FAQ & Canned Response attachments are dropping
when another agent edits the FAQ or Canned Response.

This addresses an issue where uploading a file you’ve uploaded before but
renamed is not saving the new name in the Attachment table.

This addresses an issue where FileUploadFields are displaying the old names
of existing files with new names.

issue: Canned Resp Select2 Width

This enhances the Select2 canned response box by making it wider, showing
more text in each line.

issue: Featured FAQs On Disable

This addresses an issue where the client portal shows Featured FAQs on the
sidebar even thought the Knowledgebase is Disabled.

issue: Deleted Field Thread Events (template)

canned: Canned Response Select2 Height

This adds an enhancement to the Canned Response Select2 showing more options
within the list. The length is automatic and is based on how many Canned
Responses you have Enabled.

Limits:
- Height maxes out at 400px so it doesn’t run off the screen

This addresses an issue introduced with `9ab2317e` where the icon for the
event still shows even though we continued and didn’t return the event
description.

This reverts commit 14bcd42d.

issue: IE Select2 Target

issue: Select2 Placeholder Bug

issue: Custom File Upload Dropping

This addresses issue 4155 where editing a ticket using a different session
causes custom file uploads to drop from the ticket.

This addresses an issue where Select2 Placeholders are being cutoff due to a
bug in Select2.

This addresses an issue where Microsoft IE 11 apparently does not like
`event.target` syntax in javascript and breaks the Canned Response Select2.

issue: Deleted Field Thread Events

issue: Priority Field Template Variable

This addresses an issue where deleting a field and all it's data will
delete the form field record in the database causing all events containing
the field to crash the ticket page.

This addresses an issue with PriorityField Template Variables introduced
with 4359 where the priority variable will appear as "Array" instead of the
actual value. This adds an `asVar()` function to `class PriorityField` to
get the appropriate data.

issue: Redactor Select2 Cursor Position

This address an issue introduced with 4311 where selecting a canned response
does not insert it at last cursor position, rather at the top of the text
box.

Reset Button Fix:

This commit makes sure that when the Reset button is hit, we only reset File Upload Field attachments for the specific form we're on.

Ex: Viewing a Ticket as an Agent and switching between 'Post Reply' and 'Post Internal Note'. If you had an image in the Post Reply file upload but switched to Post Internal Note and hit Reset, only the text/attachments on the Post Internal Note tab would be cleared.

(Improves upon #4369)

issue: Client Side Thread Entries

This addresses an issue where the client side thread entries are all grouped
within the same div. This pushes all grouped entries to one side of the page
making them illegible.

issue: jQuery Sortable Redactor