[INTERNAL][FIX] sap.m.NavContainer: first and only page detection fixed
[INTERNAL][FIX] sap.m.NavContainer: first and only page detection fixed

Change-Id: I928225b5e22c8938fc0c571a220c4bfd97e069bd
BCP: 1670468866

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