Add search attribute

Author: minimaluminium

default.hbs

@@ -42,7 +42,7 @@
                 {{navigation}}
             </div>
             <div class="gh-head-actions">
-                <button class="gh-search">{{> "icons/search"}}</button>
+                <button class="gh-search" data-ghost-search>{{> "icons/search"}}</button>
                 <div class="gh-social">
                     {{#if @site.facebook}}
                         <a class="gh-social-link gh-social-facebook" href="{{facebook_url @site.facebook}}" title="Facebook" target="_blank" rel="noopener">{{> "icons/facebook"}}</a>