am f1d5a3b1: am 2b9846d9: am f0093857: fix a couple bugs in sidenav for samples. Previously, clicking a link still invoked the expand collapse behavior. Previously, collapsing a parent item did not also collapse its children.

* commit 'f1d5a3b117ca827c26d901875ac69e2fde0fb106':
  fix a couple bugs in sidenav for samples. Previously, clicking a link still invoked the expand collapse behavior. Previously, collapsing a parent item did not also collapse its children.