Expand description
PopoverSurface — the themed panel a popover’s content sits in.
Style infrastructure, not a widget an app mounts: RecipePopoverStyle (and
any PopoverStyle replacing it) constructs one in make_body, and
PopoverWidget shows the result as its overlay. It lived in popover.rs
beside the standalone Popover widget until that type was removed; the two
were never related beyond sharing a file.