shell: If the workflow specified in the project is unrecognized, ask the user.
DataSelectionGui: When adding new datasets to a lane's layerstack, ensure that the data for the currently selected role is shown on top, regardless of the new dataset's role.
Fixes #420
Merge branch 'master' of https://github.com/ilastik/ilastik into counting-newboxes
labelingDrawerUi.py: add possibility to reset the empty messsage string
display add box in counting 1
labelListView and Model, change the way to implement column functionality to make it easier subclassing
new boxes start implementing sincronization with boxListModel
new boxes sincronization for deletion and selection
new boxes sincronization with an element on the boxListModel
counting: hide wiever controls