This adds a Ticket Thread Action for creating a Task. This action will
popup the New Task modal and will pre-fill the body of the New Task with
the body of the Thread Entry from which the action was made from.

Example:
Thread Entry - “I will need to check on the status of your account.”
Click Create Task from that Thread’s Actions
System will show New Task popup with the body as “I will need to check on
the status of your account.”

This commit addresses a few lint related issue - notable one is ignoring
undefined methods within source code comments.

Add DateTimeField search descriptions options for supported methods

Retire the need to auto-load the criteria of the last search - it's no
longer necessary since Recent Searches are now supported.

* Make saving advanced ticket search intuitive
* Make save separate operation from search (primary)
* Show inherited criteria on parent queue change

Conflicts:
	include/class.export.php
	scp/tickets.php

Add ability to select fields / columns to export for queues, including adhoc
searches.

* peter/feature/nested-kb-categories:
  FAQs Fixes
  Knowledge Base Folder Icon Positioning
  Add ability to nest Knowledgebase Categories

* aa/issue/dashboard_stats:
  Edit tool tips, add Date Range above Statistics
  dashboard statistics improvements/minor fixes

* kevin/issue/xss-agent-directory:
  xss: Prevent Agent Directory XSS

* kevin/issue/redactor-chrome-issue:
  redactor: Chrome Formatting Issues

* kevin/issue/list-and-choice-search:
  issue: List & Choice Searching

* kevin/issue/send-login-errors:
  issue: Send Login Errors Still Sends

* ntozier/ldap-relevance:
  Fix for LDAP/AD auth plugin

* peter/issue/ticket-filter-data:
  Ticket Filter Data Custom Forms

* Chefkeks/client-date-picker:
  Fix DatePicker on client side

* Chefkeks/translate-user-organization:
  Fixes #3650

* rbukovansky/copyright-translations:
  Allowing translation of copyrights in footers

login: Fix CSRF fail, add shake effect on authentication fail #3955 (minor fix to SQL query generated)

* greezybacon/issue/login-csrf-fail:
  login: Use AJAX to authenticate, add a shake effect
  login: Clear session data on expiration

* aa/issue/attachment_downloads:
  Exclude Vulnerable Image Files
  Only allow image attachments to be opened in the browser window

* aa/issue/ticket-preview-collabs:
  fix manage collabs for ticket preview contd
  fix manage collabs popup from ticket preview

* nicoletta-maia/develop-fix_orderby_relevance:
  Issue: SQL Error Unknown column '__relevance__' in 'order clause'