if we lower the D gain, then lower P and I by the same ratio before we
start on the P gain
Also added parameters to disable filter changes and control PI ratios
I have a camera that has picture and video trigger on the same channel. As ArduPilot is not able to handle that currently I wrote a script that allows to switch between auto and manual gimbal and camera control modes. Switching to manual camera control allows to enable picture as well as video trigger.
