DJI Osmo Action quick unmount levers

Created two small unmount levers for the DJI magnetic mounting system of the DJI Action 2 or Osmo Action 4 camera. Simply use double-sided tape to adapt the levers to the mount. For the Action 4 simply push the large lever down and move the camera by side to unlock and remove the camera from the mount. Updated the model with round edges for smoother operation.