Quick settings : Allow Quick Settings submenu to have its own submenu, a subsubmenu
Feature summary
Hi. GNOME's old user menu/quick settings has the ability for submenus to host its own submenu. This was a feature lost in the new quick settings, some extensions like GSConnect depends on this function to show mounted sftp directories from the phone if the phone has setup multiple sftp directories.
How would you like it to work
Before, how it used to work is that the submenu has a menu item with an arrow in it pointing to the right. Clicking on it would cause it to slide from the right, revealing a subsubmenu.