[Pharo-dev] [update 2.0] #20612

[Marcus Denker]

20612
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10569 Backport 2.0: Better Interrruptionche
        https://pharo.fogbugz.com/f/cases/10569
        
10940 Backport 2.0: 10925 Use caching in Gofer  
        https://pharo.fogbugz.com/f/cases/10940

Diff information:
http://ss3.gemstone.com/ss/Pharo20/Monticello-MarcusDenker.782.diff
http://ss3.gemstone.com/ss/Pharo20/Kernel-MarcusDenker.1350.diff
http://ss3.gemstone.com/ss/Pharo20/Gofer-Core-MarcusDenker.194.diff