In qrs fieldsets include the 'owner' field

Since the fieldsets for ```qrs_analytical``` and ```qrs_empirical``` are explicitly defined in ```admin.py```, we need to explicitly include the field ```owner``` in the fieldsets.
This PR also removes the "show-hide" behavior of the subsections (we will need to decide if we want to add a custom CSS class instead of ```collapse``` or if the current behavior is fine)