[INTERNAL]m.ComboBox:fires the "selectionChange" event after computation
[INTERNAL]m.ComboBox:fires the "selectionChange" event after computation

Change-Id: I6b426042fefd7f3c40e539b1223f3d9e59254032

nzamani/openui5,SQCLabs/openui5,SAP/openui5,olirogers/openui5,SAP/openui5,nzamani/openui5,nzamani/openui5,cschuff/openui5,cschuff/openui5,SQCLabs/openui5,SAP/openui5,olirogers/openui5,SAP/openui5,cschuff/openui5,SQCLabs/openui5,olirogers/openui5