Screen selector blocks submit and screen sorting is off

_Originally: https://github.com/virge-io/pricelist-frontend/issues/314_

Screen name should be sorted.

AND

When list of screens is longer; it blocks the submit:


No file or test is named. Start by locating the screen selector and its submit control in the frontend, then verify the screen names sort correctly and that a long screen list does not block submission; confirm both behaviors in the relevant UI flow.

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