toolbar: Show longpress menu using gesture
The current way poses problems when dragging the window on one of the navigation buttons, i.e. the long-press menu gets shown while dragging the window around. Also, those signals are gone in gtk4.
The current way poses problems when dragging the window on one of the navigation buttons, i.e. the long-press menu gets shown while dragging the window around. Also, those signals are gone in gtk4.