The `Bar` uses a `Repeater` when building out the models. This has the
effect of marshalling the configuration, and causing JSON arrays to
become sequence wrappers.
A couple of the plugins had been checking for the existence of array
values with `Array.isArray`, which fails for the sequence wrappers,
causing the values to be ignored. This breaks associated functionality
(the "hide" and "pin" actions in the systray had stopped working, as had
exit node selection in Tailscale).
Switching the guards to use `instanceof Array` works correctly for
sequence values (as well as arrays).
Kevin McConnell
d5492db404