A menu is a list of items displayed above its parent.
When the menu is showing its parent is darkened. Each item can have a sub-menu. The menu object can be used to display a menu on a right click event, in a toolbar, anywhere.
clicked - the user clicked the empty space in the menu to dismiss.
dismissed - the user clicked the empty space in the menu to dismiss (since 1.8)
default - A main content of the menu item
default - label in the menu item
parent (efl.evas.Object) – The parent object
**kwargs – All the remaining keyword arguments are interpreted as properties of the instance