Previously, right-clicking the audio icon muted only the output. Whereas
the switch at the top of the panel mutes all audio (inputs and outputs).
Pairing the right-click to the switch seems a bit less confusing, and
also matches the behaviour with other panels (e.g. Bluetooth, Tailscale,
etc).
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).
The bar supports switching between transparent and opaque. That means we
can't use an opaque surface for it; if we did, it would be unable to
reliably render as transparent when needed.
This fixes a visual glitch where the background of a transparent bar
would flicker, particularly during mouse hover.
* Symlink /etc/resolve.conf to systemd-resolved's stub
Since systemd-resolved is managing the DNS configuration, ensure that
/etc/resolv.conf uses it.
* Use systemd-resolved from Docker containers
