Builtin.General_BottomElevationToSeaLevel and SecondReferenceLevel request splits

[pones]

Hello all,

It seems that the built-in property Builtin.General_BottomElevationToSeaLevel actually points to the Builtin.General_BottomElevationToSecondReferenceLevel and vice-versa... tested in AC27 and 28.

Can you please fix it?

Thanks !