[INTERNAL] sap.m.Page - small cleanup in Page control
[INTERNAL] sap.m.Page - small cleanup in Page control

Change-Id: I9f1df2b660892f6d0eedf8c90c04c46fe48c752a

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