Mario,
what you describe is how it works in Unity in 16.04. The menu is correctly shown in Unity, according to the menu settings. However, in GNOME Flashback, in Ubuntu 16.04, no menu is shown.
In Ubuntu 14.04, there is a gearwheel icon shown. In Ubuntu 16.04, that icon is missing.
Mario,
what you describe is how it works in Unity in 16.04. The menu is correctly shown in Unity, according to the menu settings. However, in GNOME Flashback, in Ubuntu 16.04, no menu is shown.
In Ubuntu 14.04, there is a gearwheel icon shown. In Ubuntu 16.04, that icon is missing.