Better status message for internal error.

This also trims whitespace in app.js.

static/js/app.js

@@ -5697,7 +5697,7 @@ quayApp.directive('buildMessage', function () {
             return 'Dockerfile build failed';
 
           case 'internalerror':
-            return 'A system error occurred while building - Will be retried shortly';
+            return 'An internal system error occurred while building; the build will be retried in the next few minutes.';
         }
       };
     }