FIX (#1293): (#1413): (#1463):
FIX (#1293): (#1413): (#1463):

Preliminary fix of bug # 1293 / 1463 :Black 3D render window after volume rendering and mouse wheel event in 2D widgets
and 3D Surface Rendering slows down enormous after volume rendering

Use of vtkCallback inside the VTK-Rendering Process may cause severe damage to VTK rendering pipeline
We temporarily deactivate the Volume Rendering LOD mechanism, until some alternative for LOD is implemented

Fix of bug # 1413: Using flightmodus "F-Key" leads to vtk errors
If this mapper's GenerateData didn't run completely at least once, the VTK internal "F-Key" flight mode does not work due to 
missing instantiations of the m_VolumeLOD inputs/outputs.


rfloca/MITK,NifTK/MITK,fmilano/mitk,NifTK/MITK,lsanzdiaz/MITK-BiiG,nocnokneo/MITK,fmilano/mitk,rfloca/MITK,danielknorr/MITK,MITK/MITK,nocnokneo/MITK,danielknorr/MITK,MITK/MITK,RabadanLab/MITKats,rfloca/MITK,RabadanLab/MITKats,iwegner/MITK,MITK/MITK,danielknorr/MITK,fmilano/mitk,lsanzdiaz/MITK-BiiG,iwegner/MITK,RabadanLab/MITKats,rfloca/MITK,RabadanLab/MITKats,MITK/MITK,nocnokneo/MITK,nocnokneo/MITK,iwegner/MITK,danielknorr/MITK,rfloca/MITK,RabadanLab/MITKats,lsanzdiaz/MITK-BiiG,NifTK/MITK,MITK/MITK,lsanzdiaz/MITK-BiiG,nocnokneo/MITK,RabadanLab/MITKats,rfloca/MITK,fmilano/mitk,danielknorr/MITK,fmilano/mitk,NifTK/MITK,nocnokneo/MITK,lsanzdiaz/MITK-BiiG,iwegner/MITK,fmilano/mitk,NifTK/MITK,lsanzdiaz/MITK-BiiG,lsanzdiaz/MITK-BiiG,lsanzdiaz/MITK-BiiG,iwegner/MITK,danielknorr/MITK,nocnokneo/MITK,MITK/MITK,fmilano/mitk,NifTK/MITK,danielknorr/MITK,rfloca/MITK,iwegner/MITK