Scene UI: fixes attributions for a remixed scene & adds Storybook story

Why: the attributions for a remixed scene were neither fully tested nor fully working

Author: DougReeder

src/react-components/scene-ui.js

@@ -87,24 +87,26 @@ class SceneUI extends Component {
       source = url && url.includes("sketchfab.com") ? "Sketchfab" : "";
 
       if (remix) {
-        <span className="remix">
-          <FormattedMessage
-            id="scene-page.remix-attribution"
-            defaultMessage="(Remixed from <a>{name} by {author}</a>)"
-            values={{
-              name: _name,
-              author: _author,
-              a: chunks =>
-                url ? (
-                  <a href={url} target="_blank" rel="noopener noreferrer">
-                    {chunks}
-                  </a>
-                ) : (
-                  <>{chunks}</>
-                )
-            }}
-          />
-        </span>;
+        return (
+          <span className="remix">
+            <FormattedMessage
+              id="scene-page.remix-attribution"
+              defaultMessage="(Remixed from <a>{name} by {author}</a>)"
+              values={{
+                name: _name,
+                author: _author,
+                a: chunks =>
+                  url ? (
+                    <a href={url} target="_blank" rel="noopener noreferrer">
+                      {chunks}
+                    </a>
+                  ) : (
+                    <>{chunks}</>
+                  )
+              }}
+            />
+          </span>
+        );
       } else if (source) {
         return (
           <span key={url}>

src/react-components/scene-ui.stories.js

@@ -60,3 +60,15 @@ export const ShowUnavailable = () => (
     unavailable={true}
   />
 );
+
+export const RemixedScene = () => (
+  <SceneUI
+    sceneName="Child Scene"
+    sceneDescription="immature"
+    sceneScreenshotURL="https://example.com/"
+    sceneAttributions={{
+      creator: "Derivative Artist"
+    }}
+    parentScene={{ name: "Parent Scene", url: "https://example.test", attributions: { creator: "Über Artist" } }}
+  />
+);