[Pharo-project] [update 3.0] #30048

[Marcus Denker]

30048
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10228 Fix tab key for autocompletion
        https://pharo.fogbugz.com/f/cases/10228
        
10335 Spec: Document difference between TextModel and TextInputFieldModel
        https://pharo.fogbugz.com/f/cases/10335
        
10334 SearchableTree
        https://pharo.fogbugz.com/f/cases/10334
        
10340 Minor fixes in Spec
        https://pharo.fogbugz.com/f/cases/10340


Diff information:
http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Spec-Widgets-MarcusDenker.122
http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/NECompletion-MarcusDenker.110
http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Spec-Core-MarcusDenker.99