fix: remaining bugs for MPR and toolbar icon colors (#3026)

* feat: warn for overlapping segments

* fix: typo

* refactor mpr toggle and stack sync

* fix: wip for more general mpr

* fix: tool groups for mpr

* fix: changing of viewport id

* fix: viewport Id for the seg viewports

* fix

* update cornerstone version

platform/ui/src/contextProviders/ViewportGridProvider.tsx

@@ -64,6 +64,10 @@ export function ViewportGridProvider({ children, service }) {
 
         const viewports = state.viewports.slice();
 
+        if (!viewportOptions.viewportId) {
+          viewportOptions.viewportId = `viewport-${viewportIndex}`;
+        }
+
         // merge the displaySetOptions and viewportOptions and displaySetInstanceUIDs
         // into the viewport object at the given index
         viewports[viewportIndex] = {