Keyboard behaviour is inconsistent when editing in form #86
Description
It is not possible to properly edit Entities in the diagram using (only) the keyboard since the behaviour of tab, shift+tab, enter is not consistent.
For example: pressing Enter after editing name: the focus stays on the name field, but when pressing enter on the datatype field the focus moves out of the form.
It should be possible to edit entities in the form using only the keyboard and not resorting to mouseclicks