How should we proceed here?
1. Not changing default behaviour, but adding the hidden preference with default FALSE (= **this PR**). 2. Changing default behaviour by adding the hidden preference with default TRUE (= only a _slight_ change on this PR). 3. Changing default behaviour without adding a hidden preference to revert back (= most of this PR would be useless).
I think the best option would be **2.** because I think it is more safe for users which - for whatever reason - prefer the old behaviour.