Two simple things would make the use of forms without mouse easier and more consistent with most desktop applications.
When a form opens the first component (that can have the focus) should get the focus. I always do it with one line of code, but Anvil should do it automatically.
Add the button
cancelproperties to the button (as in vb6) or the
cancel_button(as in .net) so the form can be submitted or cancelled by pressing enter or esc, without using the mouse.