[Pharo-project] [update 3.0] #30112

[Marcus Denker]

30112
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10558 Improve Smalltalkhub repository detection from URL repository
        http://pharo.fogbugz.com/f/cases/10558
        
10561 RBLintRule should use RBBrowserEnvironment by default
        https://pharo.fogbugz.com/f/cases/10561
        
10565 AlainTreeModel selectedItems return an empty collection *always*
        https://pharo.fogbugz.com/f/cases/10565
        
10555 MorphTreeMorph do not popup the menu if the tree is empty
        https://pharo.fogbugz.com/f/cases/10555

Diff information:
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Spec-Widgets-MarcusDenker.149.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Refactoring-Critics-MarcusDenker.41.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Morphic-MarcusDenker.1423.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Monticello-MarcusDenker.802.diff