Make "Require group to make submission" widget dependent on "Students submit in groups" widget

As a follow-up of MDL-48159, I stumbled upon a minor thing:

• Create an assignment and set "Students submit in groups" setting to "No"
• Then, the "Require group to make submission" is active and can be changed. This does not make sense to me as this setting doesn't have any effect then?

Please correct me if I am wrong, but I think in this case, "Require group to make submission" should be inactive like the "Grouping for student groups" setting in the same form.