[Course Navigation] Enter to accept default response in dialog boxes

[GeoffreyWheeler]

Problem statement:

Some dialog boxes require clicking a button choice.

Proposed solution:

Provide for "Enter" to accept the default choice in all dialog boxes.

User role(s):

instructor

[GeoffreyWheeler]

Here is a dialog box that requires a click and won't accept an [Enter].

Here is a dialog box that can only be dismissed by clicking.