Revert "Display event world position recalculated if display position changed"
Revert "Display event world position recalculated if display position changed"

This reverts commit 10c6dcd1b8edcac80f0f24d4236c7ea13a0dfb67.

NifTK/MITK,NifTK/MITK,NifTK/MITK,NifTK/MITK,NifTK/MITK,NifTK/MITK