This may just need to be closed, we may not be able to control this at such a level.  This really comes up more than you would guess.  I think almost everyone has made a widget, wanted to call Editor functionality, then gone "Ah ha! I can reparent it to EditorUtilityWidget" then later banged their head against the wall as to why they don't see editor only functions. I've helped two people just this week with this and probably 4 or 5 others in the last couple of months.

Either not showing the editor classes in the reparent dialog or actually converting it to an Editor Utiltiy Widget would be fixes but they both seem rough.

Steps to Reproduce

Create a regular Widget

Change its parent to EditorUtilityWidget

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Won't Fix
Affects Versions4.22.3
CreatedMay 11, 2020
ResolvedAug 31, 2021
UpdatedSep 22, 2022