[Pharo-project] [update 3.0] #30095 - 30097

[Marcus Denker]

30097
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10488 DateAndTime now to use microseconds
        https://pharo.fogbugz.com/f/cases/10488
        
        
Diff information:
http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Kernel-MarcusDenker.1417