808: VORs are now RNAV Compatible

Thanks to Bryan in the US, the long-missed vertical guidance on my Multi-Shared VOR1 and VOR2 FIP Gauges under RNAV approach has been implemented finally.

The codes of the two FIP gauges were nearly rewritten. In addition, layouts and appearances of the gauges were revised accordingly to the recent MSFS sim update.

Furthermore, as the NAV/GPS toggling of the VOR2 on the C172 Classic is now independent from the VOR1, an extra NAV-only VOR2 is therefore included.

This is done so because