We had some bugs like 18707 <https://pharo.fogbugz.com/f/cases/18707/Cannot-open-the-context-menu-in-Versionner> Cannot open the context menu in Versionner
MenuMorph(Object)>>doesNotUnderstand: #addMenuGroup: I don't think the fix is right. We should not handle morphic objects in spec without an adapter. (and case 18584 <https://pharo.fogbugz.com/f/cases/18584/DNU-on-showing-menu-in-PointerExplorer> DNU on showing menu in PointerExplorer)
