[Pharo-dev] [update 3.0] #30192

[Marcus Denker]

30192
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10818 Integrate tabs
        https://pharo.fogbugz.com/f/cases/10818


Diff information:
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Tabs-MarcusDenker.13.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Tabs-Support-MarcusDenker.5.diff