Algolia search update (#2572)

* Search on menu toggle

With that change search is performed when requested. Before it was done
for each pageview, regardless of the fact if search was used by user or
not.

* Localize algolia's empty template

_includes/search/algolia-search-scripts.html

@@ -44,11 +44,18 @@ search.addWidget(
   instantsearch.widgets.hits({
     container: '.search-hits',
     templates: {
-      item: hitTemplate
+      item: hitTemplate,
+      empty: '{{ site.data.ui-text[site.locale].search_algolia_no_results | default: "No results" }}',
     }
   })
 );
 
-// Starting the search
-search.start();
+// Starting the search only when toggle is clicked
+$(document).ready(function () {
+  $(".search__toggle").on("click", function() {
+    if(!search.started) {
+      search.start();
+    }
+  });
+});
 </script>