Revert of changes by Ralf in commit a603537cd7e33c1f3735e397d7e95a6d93e2...

...9ac9: Replaced calls to GetMediaUrlWithoutContentCheck back to MediaManager.GetMediaUrl. This kind of changes in the "GetMediaUrl" should/could be done with an override of the Sitecore MediaProvider (Sitecore.Resources.Media.MediaProvider)