The fixture plugin's rows join `sidebar.workspaces.session.menu.item` after the shipped rows, the first one opening the plugin group with `separatorBefore`, and dismiss the menu through `useMenuOpenState`.
The fixture plugin's rows join `sidebar.workspaces.session.menu.item` after the shipped rows, the first one opening the plugin group with `separatorBefore`, and dismiss the menu through `useMenuOpenState`.