fix Kalman wind prefilter, not good. add wind speed limiter to 150kmh
fix EKF wind, not initializing the matrix when activated when already flying.
Resulting in assertion error. More prefilters, and removed ring buffer
Reset the matrix after 3 minutes of no sampling. This can happen expecially after a thermal.
But in such case, we normally have the wind from it. Or we climbed, and wind has changed at new altitude.