Permanent Visible Submenu MQ7

I just switched from Aeon Nox to MQ7. Nox had a simple submenu that was always visible and attacked to the main menu items. Since Kodi currently lacks any form of mixed source types/exclusions, I used the common trick of making smart-playlists of my separate content (Anime, Comedy stand-up, Documentaries, etc.) Now, some documentaries are series and some are feature length and you can’t mix them so I make separate smart-playlists again.

Aeon Nox’s permanent submenus helped me out here as I didn’t want to clutter up my main menu with multiple playlists of docos or comedies or whatever. So I’d make a main menu item called ‘Documentary’ and then make a submenu called ‘Doco Feature’.

Now with MQ7 we have to press ‘down’ to access the submenu. Which is really nice for a clean interface but I’m concerned I’ll ‘forget’ about my extra content if there’s no little menu item constantly next to it. Is there a way to permanently attach a submenu item in MQ7? If not, is there any other way to do it? (Like extra widgets or something.)

*Edit* I tried making a custom library node that led to both playlist types and that worked, but is kinda janky. If no permanent submenu is possible, would it instead be possible to customise it so that when I select the ‘Documentary’ main item, it activates the submenu? (just like pressing down already does) This would make it impossible to ignore the whole library and will benefit in not wasting the submenu space. Currently there is no ‘open submenu’ action or other ‘custom action’ in the ‘replace this menu’ option in the settings.