Change to have IDW automatically interpolate wind speed components when...

Change to have IDW automatically interpolate wind speed components when applied on VW, VW_MAX, VW_DRIFT or DW, and then recalculate wind speed or direction from the interpolated components.

Not sure if this should be controlled by a key, or that there needs to be a separate IDW_WIND interpolation But it's important to realize that interpolating wind speed or direction using IDW without applying it on the wind speed components leads to erroneous results, so there is no use case where it is justified to apply IDW on wind speed and/or direction directly I think. So in that light, I think it's okay to not give users control over this.