Opening a menu, for instance when adding a new field, on the last document in the crud view currently cuts off the menu, and previously when it wasn't cut off, the menu was hard to use. Let's ensure the menus are easily usable and fully shown.

[Maurizio]: Menus in the document editors don’t use a portal, if we use a portal the accessibility gets messed up, might be easy to fix with refEl as we did elsewhere.