The shared confirm sheet (44 places) gets the icon tile with the title, a
warning icon for destructive questions, and the sheets' 42 px buttons with
the danger colour on a destructive confirm. The dashboard's and the
collections' own confirm dialogs now use it.
Vacay invite, shared calendars and settings get the icon tile header; the
settings' rows separated by hairlines become cards on the inner surface, as
the trip settings' sections.
Maurice
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