Respect system theme

It would be great if there could be a new option added to the Stock Theme setting in the Appearance tab, called “System”.
When “System” is selected, it will automatically select the “Dark” or “Light” theme based on the system setting. When the system setting changes (e.g. due to automatic Dark Mode when it gets dark outside), TeamSpeak should automatically change the theme.
Both macOS and Windows 10 support Dark / Light mode.