Feature request: CSV log files

[rsilk1949]

I believe that at some time log files were saved in both LOG and CSV file types.
Pls enable the saving of log files in CSV so we can easily analyze the flight data afterwards.
Alternately, provide a utility "LOG2CSV" :)

e.g. on the Settings page :

Telemetry files:
Logging: (Y/N)
Path:
CSV: (Y/N)

[marianomd]

I implemented the functionality and created a PR on @RomanLut 's fork.

RomanLut#40