If this has the wrong type, it causes a parse error due to
https://github.com/dbus2/zbus/issues/856.
This fixes the status icon for Slack, and probably other applications.
Not sure how this field is defined in general, but with Slack it is
an `aas`.
`gnome-shell-extension-appindicator` doesn't seem to use the `shortcut`
field either.
This is at least one of the issue behind
https://github.com/pop-os/cosmic-applets/issues/165. OBS now shows it's
icon instead of an empty space. But the Mattermost flatpak doesn't show
anything. (Is that Flatpak related, or does it not use
`StatusNotifierItem`?)
Requires https://github.com/pop-os/libcosmic/pull/368. Ideally, it
should have some way to choose from multiple icons in memory of
different sizes.
This is based on the GTK version of the status area applet that was
previously in this repository.
This exposes app indicators found over dbus. As used in applications
like nm-applet and steam.
