[Pharo-project] [ANN] Part of Etoy removal updates

update10137 simple etoy cleaning from gary list. ------------------------------------------------------ update10138 HaloMorphEtoyCleaning ------------------------------------------------------ update10139 EtoyUnsentMessageRemoval ------------------------------------------------------ update10140 Object etoy cleaning (treated so far) assured beViewed belongToUniClass browseOwnClassSubProtocol categoriesForViewer: categoriesForVocabulary: aVocabulary limitClass: aLimitClass chooseNewNameForReference defaultLimitClassForVocabulary: eToyStreamedRepresentationNotifying: infoFor: anElement inViewer: aViewer Object (to fix later so far) presenter currentVocabulary defaultNameStemForInstances