[update 2.0] #20515

20515
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Issue 7422: Add a menu entry in settings to get the export string for an entry
        http://code.google.com/p/pharo/issues/detail?id=7422
       
Issue 7421: Add a Nautilus option
        http://code.google.com/p/pharo/issues/detail?id=7421
       
Issue 7387: keymappings settings are broken
        http://code.google.com/p/pharo/issues/detail?id=7387
       
Issue 6603: KeyMapping - <ctrl-a> produces MNU PluggableTextMorph>>cursorHome
        http://code.google.com/p/pharo/issues/detail?id=6603


Diff information:
http://ss3.gemstone.com/ss/Pharo20/System-Settings-MarcusDenker.271.diff
http://ss3.gemstone.com/ss/Pharo20/StartupPreferences-MarcusDenker.75.diff
http://ss3.gemstone.com/ss/Pharo20/Nautilus-MarcusDenker.411.diff
http://ss3.gemstone.com/ss/Pharo20/Morphic-MarcusDenker.1343.diff
http://ss3.gemstone.com/ss/Pharo20/Keymapping-Settings-MarcusDenker.65.diff