problems with nested autohide popovers
When you open a submenu (eg in the page 2 menubar), and click outside the toplevel, both open popovers are dismissed.
If do the same and click somewhere outside the menus but inside the toplevel, only the submenu is dismissed, and the first menu erroneously stays open. This leads to badness later on, e.g when you then click on a menubutton to open another popover, the Wayland backend throws warnings at you.