Fix renderer-specific property not used for some GetProperty calls
Fix renderer-specific property not used for some GetProperty calls

Applies to the properties:

    "reslice interpolation"
    "reslice.thickslices"
    "reslice.thickslices.num"

Signed-off-by: Taylor Braun-Jones <5d74ae093a16a00e5af127763f2dc7e13988f162@braun-jones.org>

RabadanLab/MITKats,MITK/MITK,fmilano/mitk,MITK/MITK,MITK/MITK,NifTK/MITK,MITK/MITK,danielknorr/MITK,iwegner/MITK,RabadanLab/MITKats,NifTK/MITK,NifTK/MITK,iwegner/MITK,danielknorr/MITK,danielknorr/MITK,RabadanLab/MITKats,iwegner/MITK,fmilano/mitk,NifTK/MITK,MITK/MITK,danielknorr/MITK,iwegner/MITK,RabadanLab/MITKats,fmilano/mitk,NifTK/MITK,danielknorr/MITK,danielknorr/MITK,danielknorr/MITK,MITK/MITK,fmilano/mitk,iwegner/MITK,RabadanLab/MITKats,fmilano/mitk,NifTK/MITK,fmilano/mitk,iwegner/MITK,fmilano/mitk,RabadanLab/MITKats