Devil End wrote:
The way to get it back is to uncheck the "Hide All" option and then clicking bottom left arrow. At first you will see that nothing happened, but you'll have to press Save, I'm done and then you will get all your "favorite wikis" back. You will be able to remove those that you don't want to appear on there until you're satisfied.

That's what I am looking for too, but this feature could use some more effort in really. Something like "select 4 from a list of Wikis that you are in" would be great.

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