Eliminating a field from JPABatch's constructor

The field should also be removed from the entity later.
Removing obsolete DB view code
DB view framework update - column type is now

determined in the main class (AbstractTableDBView). This is needed to
conform to specification when it comes to changing batch priority of
already scheduled (although probably not executed) batches.
Adding a presentation class for StringDBViewValue

The set is now complete and preparations for another step are made.
Changing DB view presentation wrapper to provide

callback for created cell components so that they can be specially
handled for each view.
Experiment graph changes are not sent to server

anymore if an experiment is being imported.
Vaadin doesn't serialize generic classes... doh
Various corrections / bug fixes / improvements