Action for artifact stage in tree context menu
Moved ArtifactStage to event-bundle
Propagate Stage Changes only via ArtifactSelectionService
Remove listener on dispose
Add to stage is only enabled when in 'manual add mode'
More Stage Actions
More Stage actions
Changed title
Add 'Clear stage' at the bottom of the menu
Merge pull request #158 from nilshartmann/master

More enhancements for Artifact Stage (View)