Forms should be submittable via the keyboard (normally accomplished by making the submit button a button of type submit rather than just a generic button). This applies to the dialog that creates stitch applications, and probably others.
I am marking this complete as we have made a number of improvements in this space. If there is a specific page that is giving you trouble feel free to reach out!
Hi – We are looking into some general UI Improvements over the next quarter and will keep this in mind.