only re-send event to vtk if it hasnt been handled
only re-send event to vtk if it hasnt been handled

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