[BUGFIX] Consider demands in AdministrationController's pagination

Change the form to get instead of post to still have the demand
object on the next pages.

Additionally add the count of news items in the tfoot.

Change-Id: Ia440f9895ad2ed8c5ea010bab9bc5992060c9ba0
Resolves: #61488
Reviewed-on: http://review.typo3.org/35335
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>