Adding Instances Only for Selected Concepts
Adding instances requires to select the according concept (Case Base View). However, the workbench does not enforce it and lets the user create "broken" cases, i.e. when the project is selected.
This could be solved by checking whether a concept has been selected.
- if yes --> proceed and create the instance
- if no --> give a warning dialog "please select a concept for the new instance" and DO NOT CREATE ANYTHING - just return to the main view