Wrong waypoint projection for geocaching waypoints

If you try to perform a waypoint projection from a geocaching waypoint, then the resulting waypoint may be wrong - depending where the actual screen center is located.

To reproduce:

1. Place the center of the map anywhere, say to Prague
2. Select a geocache, e.g. https://coord.info/GC2G6T0
3. Open the waypoint menu
4. Select + sign to add a new waypoint
5. Select projection from GC2G6T0 Stage 2 (Stage 1 would do as well)
6. Enter e.g. 200m and 0°
7. Press compute

Note that the created waypoint has been projected from the screen center instead from the selected waypoint.

This bug gave me a hard time in the field until I noticed that the issue is on Locus and not on me.