[update 3.0] #30009

30009
-----

10005 floatPrecision: setter is missing from UpdatingStringMorph
        https://pharo.fogbugz.com/f/cases/10005/
       
10100 TaskListMorph: remove unused classVar UseHistoricalShortcuts
        https://pharo.fogbugz.com/f/cases/10100
       
10099 Improve CommandLineArgument API optionAt:ifPresent:
        https://pharo.fogbugz.com/f/cases/10099/
       
10095 HandMorph>>userPicture[:aPicture] unused. Can be removed.
        https://pharo.fogbugz.com/f/cases/10095

Diff information:
http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/System-CommandLine-MarcusDenker.81
http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Polymorph-Widgets-MarcusDenker.780
http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Morphic-MarcusDenker.1380