[FEATURE] Add clear cache menu for Admins in non production mode

Resolves: #62183
Change-Id: I3cc8d30dc0a8650ba1c0f82ddc6800c99d506c80
Reviewed-on: http://review.typo3.org/33291
Reviewed-by: Tim Lochmüller <tim@fruit-lab.de>
Tested-by: Tim Lochmüller <tim@fruit-lab.de>