Column with checkboxes for multiple deletion

Extranet ticket: https://extranet.4teamwork.ch/dev/4teamwork-egov/tracker-4teamwork-egov/961

- [x] Display column with checkboxes
- [x] Delete button at the bottom of the table
- [x] Important: Deletion of content from different context has to work.
- [x] Implement Move
https://github.com/4teamwork/opengever.core/blob/master/opengever/tabbedview/browser/generic_dossier.pt#L20
https://github.com/4teamwork/ftw.tabbedview/blob/master/ftw/tabbedview/browser/listing.py#L296
move_items.py https://github.com/4teamwork/opengever.core/blob/master/opengever/dossier/move_items.py