List all themes in a pretty format.

def list_out():
    """List all themes in a pretty format."""
    dark_themes = [theme.name.replace(".json", "")
                   for theme in list_themes()]
    ligh_themes = [theme.name.replace(".json", "")
                   for theme in list_themes(dark=False)]
    user_themes = [theme.name.replace(".json", "")
                   for theme in list_themes_user()]

    if user_themes:
        print("\033[1;32mUser Themes\033[0m:")
        print(" -", "\n - ".join(sorted(user_themes)))

    print("\033[1;32mDark Themes\033[0m:")
    print(" -", "\n - ".join(sorted(dark_themes)))

    print("\033[1;32mLight Themes\033[0m:")
    print(" -", "\n - ".join(sorted(ligh_themes)))

    print("\033[1;32mExtra\033[0m:")
    print(" - random (select a random dark theme)")
    print(" - random_dark (select a random dark theme)")
    print(" - random_light (select a random light theme)")