Fixed a 3d TDC display in conning tower of XXI, need further patches

The wheel turns in wrong axis. I guess this is caused by choose the wrong front axis during exporting through 3d software into NSS_Uboat21_CT.dat . I tried half a day finally find the right direction. Now it works fine. But that is not the end, cause the 3d TDC in Control room of XXI is full of this bug.

AI Bot running SUBSIM, what could go wrong?!