Menu actions, such as the "Close" and "Update" review request actions,

were broken on mobile. A touch on an action item within the menu would

just close the menu instead of activating the action. This happened

because the touch handler for menu actions always just opened/closed the

menu regardless of whether touch was on an item or not.
This change fixes this, and updates a similar touch handler for the

unified banner. Previously, the unified banner touch handler would check

whether the touch was on a ink-c-menu__item-label. This was always

guaranteed to correctly determine whether the touch was on a menu item

because the label encompassed the entire element of the menu item.

However this could change in the future, and then we'd have a bug where

touches on menu items only work properly when the touch is exactly on

the label.
This change also alphabetically sorts a set of keys in the menu action

view JS file.

Tested opening/closing the "Close" and "Update" menus, and tapping

  on actions in them.
Tested opening/closing the unified banner's "Review" menu, and tapping

  on actions in it.