Migrate Forms/FileManager/HtmlEditor demos to the new nested component syntax (#31557)

Author: dxvladislavvolkov

packages/devextreme/testing/runner/Views/Main/RunAll.cshtml

@@ -93,7 +93,7 @@
             if(window.ActiveXObject !== undefined)
                 return 1;
 
-            return 2;
+            return 10;
         };
 
         WORKER_COUNT = calcWorkerFrameCount();