am 36ea7a3d: remove the dummy sidenav from samples before populating the real list. Also make the line numbers hidden before they get moved to avoid some jankyness during load.

* commit '36ea7a3d74c68d62a5d081401b887e848370f6d8':
  remove the dummy sidenav from samples before populating the real list. Also make the line numbers hidden before they get moved to avoid some jankyness during load.