Board Thread:Support Requests - Getting Technical/@comment-5645428-20190812055103/@comment-168424-20190815152037

It's not a bug. Mist likely just a removal or a name change. FANDOM staff could give you the definitive answer, since you don't seem to believe anyone here.

It also may have only existed for a couple years. Only recently has FANDOM even been transparent about changing the UI... often unless it was big or obvious they would just change stuff and sort of explain it when people made a big stink.