This addresses issue 4325 where the Language Pack Locales are mismatched.
The Locale for the first language is displayed on the second language,
etc. This updates the `$manifest` variable to be set before we display
data so the correct `MANIFEST` file is included and all language data is
displayed correctly.

issue: Section Break Hint

oops: Prevent Account Takeover

orm: queryset: Fix circular reference error

xss: Prevent Agent Directory XSS

Check permissions before displaying Close Task

format: Fix Vimeo iFrames

issue: Fix imap_open Disable Authenticator

oops: Fix randNumber()

issue: AJAX Reflected XSS

issue: Prevent Click Jacking

issue: Information Page Performance

This addresses an issue on the forums where the query to determine the
size of the `file_chunk` table is making the page load really slow for
people with large tables. This updates the query to improve the
performance of the page load time.

This addresses a vulnerability where there was no `X-Frame-Options` header
which could potentially allow click jacking. This adds the
`X-Frame-Options: SAMEORIGIN` header so it will remove any chance of click
jacking. According to Mozilla Developer Docs:
```
SAMEORIGIN
The page can only be displayed in a frame on the same origin as the page
itself.
```

issue: Files - deleteOrphans()

This addresses the issue where files were being deleted before being sent
out in Agent responses. This was due to a bug in the query that gets the
orphaned files. This query was getting files created within the last 24
hours not after the last 24 hours. The query also had another bug that
would use the time from PHP instead of MySQL which could cause issues.
This updates the query as per @greezybacon's suggestions to delete
orphaned files that were created more than 24 hours ago.

This fixes an error where the ModelInstanceManager maintained a reference to
the QuerySet instance, and the QuerySet instance managed a reference to the
ModelInstanceManager instance (if it's the iterator for the query). Because
of the circular reference, if the iterator is not exhausted, then the
resource is not closed and the query remains open. This wastes memory and
prevents some other queries from running after such a situation happens.

This addresses the issue by removing the circular reference between the
QuerySet and the ModelInstanceManager.

issue: Outlook _MailEndCompose

upgrader: Flush Cache On Upgrade

issue: Org. User Account Status

This addresses an issue where the Upgrader will sometimes use an outdated
cached object and throw an error. This adds a the function to clear the
Model Cache every time the Upgrader runs an Upgrade Patch to get fresh
objects.

This addresses an issue where the User’s account status is always 'Active'
in the Organization list no matter what their actual status is. This adds the
account status to the user query which adds the correct status to the Users’
account.

This addresses an issue where Outlook adds weird (and seemingly random)
_MailEndCompose tags to the email body which turns unwanted content into
links. This adds the _MailEndCompose tag to Format::sanitize() so it
will be removed from the email body.

* issue/ajax-reflected-xss:
  issue: AJAX Reflected XSS

* issue/csrf-in-users-url:
  issue: CSRF In users.inc.php URL

* issue/rand-number:
  oops: Fix randNumber()

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

* issue/file-upload-bypass:
  issue: File Upload Bypass

* issue/httponly-cookies:
  issue: Httponly Cookies

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

This addresses an issue where you can exploit XSS in the help-topic AJAX
request. This adds a check for a refferal URL and if none it will return
a 403 Forbidden Response.

This addresses an issue where the CSRF Token is displayed in the URL
when you preform a search in the Users Tab. This removes the token from the
request which removes it from the URL.

This addresses an issue where the 'DISABLE_AUTHENTICATOR' args were not
properly added to the `imap_open` params. This changes the `+=` operator
to `array_merge()` to successufully add the params.

This addresses a vulnerability where an Agent can perform XSS via the
Agent Directory’s REQUEST query string. This sanitizes the request params
so the code will be escaped and not executed in the browser.

This addresses an issue where some Vimeo videos are not being sent in
Agent’s responses. This adds `player.vimeo` to the sanitize method’s
iframe section so that the iframe tag is not stripped.