* 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'

Add ability to export agents access in CSV format

Merge remote-tracking branch 'kevin/issue/default-dept-private-error' into features_prs/develop-next

This addresses issue 4073 where Disabling the 'Excessive failed login
attempts' option in the Ticket Alert settings will still send the Admin
Excessive failed login alerts. This is due to the method that checks if
the setting is Enabled returns `0` or `1` not `TRUE` or `FALSE`. So this
updates the section of code to return `FALSE` for `0` and `TRUE` for `1`
so that it properly disables/enables the alerts.