[update 1.4] #14366

14366
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Issue 5418: compressedSourceCodeAt: is not used
        http://code.google.com/p/pharo/issues/detail?id=5418
       
Issue 5414: class FormStub is unused and undocumented
        http://code.google.com/p/pharo/issues/detail?id=5414
       
Issue 5417: FlatMessageListBrowser error on method removal
        http://code.google.com/p/pharo/issues/detail?id=5417
       
Issue 5160: sourceCodeAt: vs. sourceMethodAt:
        http://code.google.com/p/pharo/issues/detail?id=5160
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Marcus Denker -- http://marcusdenker.de