[INTERNAL] sap.m.NavContainer - improve navigation dequeue logic
[INTERNAL] sap.m.NavContainer - improve navigation dequeue logic

- improves I32e498bcb46e0b9cd9110a227060cdb3a90fd16b
Change-Id: Id7215cbe30559e43834e7fe1becfb0d48f34278a

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