[TASK] EditController uses deprecated authCode

With #60165 authCode is deprecated. The EditController should
also use the new authentication.

Change-Id: Ia1de82592e19cb5f0490064663c1ca9324c99503
Reviewed-on: http://review.typo3.org/32059
Reviewed-by: Sebastian Fischer <typo3@evoweb.de>
Tested-by: Sebastian Fischer <typo3@evoweb.de>