Use close button instead of geolink in sidebar content

app/assets/javascripts/index.js

@@ -406,4 +406,8 @@ $(document).ready(function () {
       e.preventDefault();
     }
   });
+
+  $(document).on("click", "#sidebar_content .btn-close", function () {
+    OSM.router.route("/" + OSM.formatHash(map));
+  });
 });

app/views/application/_sidebar_header.html.erb

@@ -1,6 +1,6 @@
 <div class="d-flex w-100">
   <h2 class="flex-grow-1 text-break"><%= title %></h2>
   <div>
-    <a class="geolink d-block btn-close" href="<%= root_path %>"></a>
+    <button type="button" class="btn-close"></button>
   </div>
 </div>