Altitude scale in side view plots

[Sören Johansson]

In the side view window the only choice for a vertical coordinate is pressure in hPa. Some people are more used to altitude in km, so it would be convenient to have the choice for (approx.) altitude or pressure or have two y-labels scales.

[Joern Ungermann]

Pressure altitude would be feasible. Any more accurate altitude would require information that is not necessarily available. I'll see if that can be arranged.

[Reimar Bauer]

Implemented the ability to change vertical axis in sideview

Can be switched now between pressure, pressure altitude and flightlevel.

Fix issue #226

→ <<cset 51ae577c5d7f>>