Vertical menus should optionally look like folders with + sign, not CSS-Flyouts.
If you have a vertical menu in PresenceBuilder (left or right), it should automatically (or at least offer the choice to) look like a folder-structure which can be additionally set to "always show the current level opened", not just this CSS-Flyout-thingy when hoovering over the arrow to the right you have to catch with your mousepointer.
It would be more intuitive, if folders with submenus have a "+" sign prefixing it or inside them, and the current open/active folder has a "-" sign prefixing or in there and shows all submenus (if available).
And those submenus or entries should be of course intended. Just the usual look a normal Windows or Linux/Mac user would expect when working with folders/files on his PC.
Cheers,
Eric

We do not plan on introducing major changes to Web Presence Builder at the moment.
—AK