hm, thats dump. I think I will have to take a close look to menumanager again... hamburger menu in style of libratus would be perfect.

hamburger menu in style of libratus would be perfect.

The menu_manager plugin is layout agnostic and just creates a list. The layout is entirely up to the theme's CSS.

I have taken a quick look at the slideshow album usage. It uses the image_album_statistics plugin for getting the images which only works with published items (e.g. those the visitor is allowed to see).

It can be changed to use an album directly but sadly the theme uses the specific sorting options of that plugin which then would not work anymore. Or the plugin needs an addition to bypass visibility/access checks.

It's easier than I thought.
In the theme's options there is a Custom CSS field.
You can copy/paste the following line in that field.
#nav li a[title='titleimages'] {display: none;}
This assumes that the title of your folder (album) is titleimages.

That would of course work but is more a workaround actually…

I tried quickly to add menu_manager support but this really requires some CSS reworking to work that I sadly don't have the time to investigate right now…