Artifact Stage Preferences
Fixed handling of circular dependencies
Select dependencies in both directions when clicking on a circular
dependency edge
Propagate empty dependency selection
When selecting an Artifact set it's incoming and outgoing dependencies
in DependencySelectionService
Fixed bug when more than one artifact is selected
Fit and Auto Fit Actions
Enable autofit by default
Moved Helper to ui package
Switch to Manual Add mode before unstage
Merge pull request #177 from nilshartmann/master

Enhancements and bugfixes