Updated on Jul 7, 2020
* user interface
- vario: fix overlapping text lines
* tracking
- SkyLines: update tracking IP address
* support for long-form `DTE` header in IGC files
* Windows
- fix buffer overflow causing crashes in the waypoint dialog
* Raspberry Pi
- support 64 bit kernels
- Raspberry Pi 4 support
- detect display dimensions and scale user interface accordingly
* macOS
- add macOS Catalina font path
for more see https://github.com/Turbo87/XCSoar-TE/blob/v6.8.15-TE/NEWS.txt#L55-L142
