[FIX] sap.m.ComboBox: Prevent Suggestions Popover's highlighting
[FIX] sap.m.ComboBox: Prevent Suggestions Popover's highlighting

Change-Id: I87ccac1187d68898721d475c4cb24230773875e0
BCP: 1970579874

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