{# phase52 — which contracts may use this form. The hidden
marker tells the route this modal really did include the
field, so an empty selection means "share it" rather
than "no field was posted, leave it alone". #}
Leave nothing selected to share this form with
every contract (this is how all existing forms are set).
Select one or more contracts to restrict it to them — it is
then hidden from every other customer, on the web and in the
iPad app. Ctrl/Cmd-click to select several.