[BUGFIX] Rephrase offset label

Change-Id: I8f2ce06dec2aaa9a1d02cd009964c50bdecee9b1
Resolves: #52657
Reviewed-on: http://review.typo3.org/31897
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>