getFlexReferenceForSelector(oSelector) {
			if (oSelector.appId) {
				return oSelector.appId;
			}
			return ManifestUtils.getFlexReferenceForControl(oSelector.appComponent || oSelector);
		}
Determines the flex reference for a given {@link sap.ui.fl.Selector} by
identifying the application component and analyzing the manifest of this component.
In case of a {@link sap.ui.fl.ComponentSelector} the appId is taken as is.

@param {sap.ui.fl.Selector} oSelector - Selector object
@returns {string} Reference of the application