In order to give users for whom the newly introduced feature is enabled by default enough time to disable it in advance, we want to introduce a feature toggle. The idea is to disable the feature's functionality on wikis that will have the feature enabled by default (dewiki, maybe plwiki). Users can edit their preferences already, so they will be given enough time to decide before the feature itself is enabled. The feature toggle is temporary.
- The feature can be enabled/disabled per wiki. It is disabled by default.
- The option in the user preferences is shown either way.
- Instead of enabling the feature for wikis that had it disabled previously, the feature toggle should be removed again.