cleanup: Don't use actor property on actors

As per this we need to bump the dependency on GNOME Shell 3.33

Fixes ubuntu#186

Version v29

version 28

version 27

Version 26 (backport)

Upstream version 28

Debian release 28-1

v24: drop ES6 features

Debian release 23.1-1

gnome-shell-extension-appindicator Debian release 23-2