Merge remote-tracking branch 'origin/fix_vishnu_vistrails_name'

* origin/fix_vishnu_vistrails_name:
  Fixed wrong var name used for vistrails root
Adds modules selection and deletion. Fixes style
Fix selection
Fix workflow button styles
Fix initial size
Merge branch 'master' into 131-workflow-cleanup
Merge branch '131-workflow-cleanup' into next