[Pharo-dev] [update 3.0] #30228

30228 ----- 11048 Dont display a StringMorph if the string is nil https://pharo.fogbugz.com/f/cases/11048 11011 Using anonymousSubclassOf: for creating anonymous subclasses https://pharo.fogbugz.com/f/cases/11011 11043 Update Opal to newest version https://pharo.fogbugz.com/f/cases/11043 Diff information: http://smalltalkhub.com/mc/Pharo/Pharo30/main/Polymorph-Widgets-MarcusDenker... http://smalltalkhub.com/mc/Pharo/Pharo30/main/OpalCompiler-Tests-MarcusDenke... http://smalltalkhub.com/mc/Pharo/Pharo30/main/OpalCompiler-Core-MarcusDenker... http://smalltalkhub.com/mc/Pharo/Pharo30/main/NativeBoost-Core-MarcusDenker....