mara: "use the new component where we already have confirm dialogs."
The stop/offline direction of the wanted toggle used a native
window.confirm -- the reasoning at the time was that a hand-rolled
Dialog felt heavy for a reversible action, with the real Dialog confirm
reserved for the irreversible destroy direction. Now that
ConfirmDialog is a one-line-per-caller shared component, that argument
no longer buys consistency anything, so both directions confirm the
same way.
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