faces/FullRepresentation.qml: add minimum sizes
Without minimum sizes these items will get stuck in a loop switching back and forth between compact and full representation, which then freezes plasmashell.
This change ensures there is some minimum sizes available.
(cherry picked from commit ea5b49ed)
ea5b49ed faces/FullRepresentation.qml: add minimum sizes
Co-authored-by: Akseli Lahtinen akselmo@akselmo.dev