[FIX] sap.m.MenuButton: Inner text width fixed
[FIX] sap.m.MenuButton: Inner text width fixed

BCP: 2080209672

Change-Id: I98c0f7836d9659251f454175db0b26a74efbdf74

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