[Pharo-project] [update 3.0] #30106

[Marcus Denker]

30106
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10527 Clean up unused fileOut related code / cleanup traits methods in 
ClassDescription
        https://pharo.fogbugz.com/f/cases/10527
        
        
10530 Add support for platform independent handling keys on keydown and keyup
        (just class comments, there was nothing else in the slice)
        https://pharo.fogbugz.com/f/cases/10530
        
7026 Move users of SystemBrowser to use ToolRegistry instead
        https://pharo.fogbugz.com/f/cases/7026



Diff information:
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Traits-MarcusDenker.497.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Tools-MarcusDenker.1106.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/System-Platforms-MarcusDenker.38.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Nautilus-MarcusDenker.455.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Settings-Tools-MarcusDenker.41.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Morphic-MarcusDenker.1417.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Kernel-MarcusDenker.1430.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Files-MarcusDenker.ducasse.298.diff