Redirect to the first app browser when only a single app is registered (#958)

* Redirect to the first app browser when only a single app is registered

* Apply @flovilmart suggestion to use the deconstructing operator when extracting a single app for redirecting

Author: cyrilchandelier

src/dashboard/Apps/AppsIndex.react.js

@@ -96,6 +96,11 @@ export default class AppsIndex extends React.Component {
   }
 
   componentWillMount() {
+    if (AppsManager.apps().length === 1) {
+      const [app] = AppsManager.apps();
+      history.push(`/apps/${app.slug}/browser`);
+      return;
+    }
     document.body.addEventListener('keydown', this.focusField);
     AppsManager.getAllAppsIndexStats().then(() => {
       this.forceUpdate();