New guidance max bank attempt

 - Split PD and I-gain with separate max bank
   - no wind: integrator (trim attitude) = 0, PD maxbank = -20 to 20 extra: total: -20 to 20
   - huge wind: integrator (trim attitude) = 20, PD maxbank = -20 to 20 extra: total: 0 to 40
 - Put gain before integrator to get better insight in the saturation values
 - Reduce integration overshoots while increasing integration speed by adding the speed error as well
   - no speed error: integrate as before
   - counterproductive speed error, integrate faster
   - if the position error is already decreasing fast, no integrator is needed or it will overshoot

Not yet test-flown: posted to get feedback / test-volonteers