Follow system theme option doesn’t work

[jurf]

Skype includes an option to use system settings for picking the light/dark variant of the theme. However, this option doesn’t work; it always sets the theme to light, despite the system theme being dark.

[TingPing]

There is no real "standard" for dark modes yet, the general assumption is theme names ending in -dark are, but eitherway this isn't something the package can change.