[FIX] sap.m.MenuButton: ACC sample fixed
[FIX] sap.m.MenuButton: ACC sample fixed

* last 4 rows of controls are placed in OverflowToolbar instead of VerticalLayout

Change-Id: Ifa5035391d2d96d8c8e70bb0fd51d602f7304499
BCP: 2170266529

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5