change button to a

services/web/app/views/templates/index.jade

@@ -74,7 +74,7 @@ block content
 				ng-click="cancel()",
 			)
 				span #{translate("dismiss")}
-			button.btn.btn-primary(href='mailto:team@sharelatex.com?Subject=template') #{translate("email_us")}
+			a.btn.btn-primary(href='mailto:team@sharelatex.com?Subject=template') #{translate("email_us")}