<md-menu>
Menus display a list of choices on a temporary surface.
Menus appear when users interact with a button, action, or other control.
They can be opened from a variety of elements, most commonly icon buttons, buttons, and text fields.
md-menu listens for the close-menu and deselect-items events.
close-menucloses the menu when dispatched from a child element.deselect-itemsdeselects all of its immediate menu-item children.