Currently horizontal scroll restores a maximized only if the mouse is inside the maximize/restore window control (the square). The horizontal scroll in the application/global menu opens it (bug #775872) while the horizontal scroll in the minimize window control (-) blows up unity.
Currently horizontal scroll restores a maximized only if the mouse is inside the maximize/restore window control (the square). The horizontal scroll in the application/global menu opens it (bug #775872) while the horizontal scroll in the minimize window control (-) blows up unity.