[FIX] sap.ui.dt: IE doesn't support document.contains()
[FIX] sap.ui.dt: IE doesn't support document.contains()

Change-Id: Ia431aa0cdc892d34967434b3225b8a705d10b90d
Signed-off-by: Vitor Seifert <9cc97ad0c2349e133a2d1a7ff3523c18c5bc4330@sap.com>
SAP/openui5,SAP/openui5,nzamani/openui5,SAP/openui5,cschuff/openui5,SAP/openui5,cschuff/openui5,SQCLabs/openui5,nzamani/openui5,SQCLabs/openui5,cschuff/openui5,SQCLabs/openui5,nzamani/openui5