feat(4D): Add 4D dynamic volume rendering and new pre-clinical 4d pt/ct mode (#3664)

Co-authored-by: Alireza <ar.sedghi@gmail.com>
Co-authored-by: Neil <neil.a.macphee@gmail.com>

extensions/cornerstone/src/getToolbarModule.tsx

@@ -192,7 +192,7 @@ export default function getToolbarModule({ commandsManager, servicesManager }) {
         }
 
         const displaySets = displaySetUIDs.map(displaySetService.getDisplaySetByUID);
-        const isUS = displaySets.some(displaySet => displaySet.Modality === 'US');
+        const isUS = displaySets.some(displaySet => displaySet?.Modality === 'US');
         if (!isUS) {
           return {
             disabled: true,