[FIX] sap.m.Page: Initial rendering of floating footer corrected
[FIX] sap.m.Page: Initial rendering of floating footer corrected

If the floating footer page is inially loaded in rtl language
the footer width was set incorrectly.

BCP: 1880580081

Change-Id: I51fdd574a710e644ab03f5026118b8abdcd51632

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5