Overwrite assets URL if someone is still using labs

Viewer/src/configuration/configurationCompatibility.ts

@@ -43,7 +43,7 @@ export function processConfigurationCompatibility(configuration: ViewerConfigura
 
     if (configuration.lab) {
         if (configuration.lab.assetsRootURL) {
-            setKeyInObject(configuration, "scene.assetsRootURL", configuration.lab.assetsRootURL);
+            setKeyInObject(configuration, "scene.assetsRootURL", configuration.lab.assetsRootURL, true);
         }
         if (configuration.lab.environmentMap) {
             setKeyInObject(configuration, "environmentMap", configuration.lab.environmentMap, true);
@@ -63,4 +63,4 @@ function setKeyInObject(object: any, keys: string, value: any, shouldOverwrite?:
     });
     if (curObj[lastKey] !== undefined && !shouldOverwrite) return;
     curObj[lastKey] = value;
-}
+}