[FIX] Remove/adjust usage of sap.ui.Device.os.ios indicator
[FIX] Remove/adjust usage of sap.ui.Device.os.ios indicator

- Add always ios specific meta tags to simplify coding
- Adjust usage of sap.ui.Device.os.ios because it does not reliable indicate if used device os is iOS in case page is requested as "Desktop Website"

Change-Id: Ie34c156d765ea4e1124f6476bae71231ba16f9b3

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