Added latest from Cornerstone WebGL branch

Packages/viewerbase/client/components/viewer/imageViewerViewport/imageViewerViewport.js

@@ -130,10 +130,14 @@ function loadSeriesIntoViewport(data, templateData) {
 
     // Enable Cornerstone for the viewport element
     //
+    var options = {
+        renderer: 'webgl'
+    };
+    
     // NOTE: This uses the experimental WebGL renderer for Cornerstone!
     // If you have problems, replace it with this line instead:
     // cornerstone.enable(element);
-    cornerstone.enable(element, cornerstone.webGL.renderer.render);
+    cornerstone.enable(element, options);
 
     // Get the handler functions that will run when loading has finished or thrown
     // an error. These are used to show/hide loading / error text boxes on each viewport.