[FIX] sap.m.Popover: beforeClose event is fired on touch devices
[FIX] sap.m.Popover: beforeClose event is fired on touch devices

Change-Id: Iabbb9aa287df4c85118f50d6633a67adc1aaeda1
BCP: 1580142721

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