It turned out that behat's "I should see ..." does not work for buttons
rendered as `<input>` elements so this assertion worked only in Boost
where the button is rendered as `<button>` but not in Clean.
But we do not really need this check here. All we need is to make sure
that the form has been saved successfully. For which, checking for the
text on the page is enough.
p.s. Another mistake of mine to not double-check behat on both standard
themes. Sigh ...
David Mudrák
6218889e2d