Bare rows stack on narrow viewports with a larger gap inside a row than
between rows, so the remove button read as belonging to the profile below.
Each profile is now a bounded row, and the list carries the bottom spacing
`SettingsRow` leaves to its children.

`MenuGroupLabel` renders a block box, so `text-overflow` on an inline span
inside it never applied and a long profile name pushed the popup past its
width. The truncation sits on the label itself.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>