Make directly nested lists indent in narrow screens
Make directly nested lists indent in narrow screens

Fixes #45.
jupytercalpoly/jupyter-alabaster-theme,ellisonbg/jupyter-alabaster-theme,charnpreetsingh/jupyter-alabaster-theme,jupytercalpoly/jupyter-alabaster-theme,jupytercalpoly/jupyter-alabaster-theme,charnpreetsingh/jupyter-alabaster-theme,ellisonbg/jupyter-alabaster-theme,ellisonbg/jupyter-alabaster-theme,charnpreetsingh/jupyter-alabaster-theme