[Pharo-project] [update 3.0] #30020

30020 ----- 7235 We should move KeyedTree from Polymorph-Widgets to Collections-Unordered https://pharo.fogbugz.com/f/cases/7235 7540 Etoys related cleanup in CursorWIthAlpha https://pharo.fogbugz.com/f/cases/7540 Diff information: http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Tests-MarcusDenker.526 http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Polymorph-Widgets-MarcusDenke... http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Morphic-MarcusDenker.1388 http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Graphics-Display Objects-MarcusDenker.106 http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/CollectionsTests-MarcusDenker... http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Collections-Unordered-MarcusD...