Keyboard arrows mapped to migration steps is misleading

[js-ddev]

To navigate through steps, the Migrator proposes Previous/Next buttons, and also at each step it is possible to go back or go forward using left and right arrow keys.

As at pretty much each step you need to take an action, and as the arrow keys are also used to navigate in forms fields, it often leads to misbehavior going to other steps without wanting it and complicates the form filling.