Menubar/toolbar in titlebar?

[developer91234]

I don't know if it's at all possible to do cleanly, but it would make the apps look more Gnomish if the titlebars weren't empty. One obvious solution would be to shove the menubar in the titlebar. There was an attempt to pull this off https://sourceforge.net/projects/styleproject/.

BTW, a few KDE applications are moving to hamburger menus, so if one could somehow shove the window controls in the toolbar, that would bring these apps even closer to gnome.

If one were to implement this, one would also need to implement the drag from non-empty behavior of gnome headerbars. Kvantum can do this.