MenuBar submenus close unexpectedly if use Valo theme (#15255)

This fix is for animation-in and animation-out.

Fix was done in VMenuBar. VOverlay provides now hide() method with
possibility to enable/disable the animations via parameters boolean
animateIn, boolean animateOut. By default they are true (not to break
animate-in, animate-out for VWindow and VNotification)

Change-Id: I49981952c7c18a02edd7fa9e6d247bb18f660207