fix: mpr2d vtkjs viewport does not render if range is set to NaN values (#1157)

* chore: fix proptypes declaration

* fix: seperate helper method to calculate our initial range

* chore: remove unused import

* chore: update studies propType from object to array

extensions/vtk/src/commandsModule.js

@@ -1,7 +1,6 @@
 import {
   vtkInteractorStyleMPRCrosshairs,
   vtkInteractorStyleMPRWindowLevel,
-  vtkInteractorStyleMPRSlice,
   vtkInteractorStyleMPRRotate,
   vtkSVGCrosshairsWidget,
 } from 'react-vtkjs-viewport';