TextInputWidget: Adjust size and label on first focus, too
TextInputWidget: Adjust size and label on first focus, too

Since #onElementAttach is unreliable, when it fails (as it is bound
to), the behavior will be slightly less user-hostile.

Bug: T89399
Change-Id: I0ae038608429cbfc3212b286de42e373b9608689

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui