Fix topcoder-platform#2911 [MSFT-264] Keyboard access tab operational missing

Author: asadath1395

src/client/styles.scss

@@ -3,6 +3,6 @@
    * the page by Topcoder accounts-app. */
   #tc-accounts-iframe {
     border: none;
-    display: block;
+    display: none;
   }
 }