[Pharo-project] [update 2.0] #20286

[Marcus Denker]

20286
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Issue 6665:     Improve Nautilus Performance
        http://code.google.com/p/pharo/issues/detail?id=6665
        
Issue 6660:     Move Workspace out of StringHolder hierarchy
        http://code.google.com/p/pharo/issues/detail?id=6660
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Marcus Denker -- http://marcusdenker.de