<p>I've made hide/unhide button a simple link as you suggested.</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br>Reply to this email directly or <a href="https://github.com/openstreetmap/openstreetmap-website/pull/772#issuecomment-50968642">view it on GitHub</a>.<img alt="" height="1" src="https://github.com/notifications/beacon/1419053__eyJzY29wZSI6Ik5ld3NpZXM6QmVhY29uIiwiZXhwaXJlcyI6MTcyMjYxODk1NSwiZGF0YSI6eyJpZCI6MzU4NjU3NjJ9fQ==--b814407c13295fd11cad6ef441ba25beded4ee2b.gif" width="1" /></p>