[GPS Trekkinng] Altitude showing wrong values

### Affected hardware version

Bangle 2

### Your firmware version

[GPS Trekkinng] Altitude showing wrong values

### The bug

In the app GPS Trekking the altitude is korrekt only when there is no gps fix. If a gps fix comes in the displayed altitude differes much from the barometric altitude (simple to compare with "altimeter widget")

I would expect that on the bangle2 the gps altitude is ignored totaly in this app.

And the altitude-gain is counting in the wrong direction. climbing up ist displayed in "Down" and vice versa.

Thanks

cheers /Hendrik/

### Installed apps

_No response_