egui's combo box puts its own scroll area around a combo's list, so the
font menu, which scrolls its families itself, had two scrollbars: once
the families reached their end the wheel scrolled the outer one, taking
the search field and the filters out of view.
The font menu (widgets::combo with searchable) now opens its list in a
popup of its own, drawn like the combo box, without that outer scroll
area: below the button, or above it when there is more room there. The
families list fills the popup's room under the search field and filters,
which stay at the top while the list scrolls.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>