URL encode search in web UI

Fixes #986

meilisearch-http/public/interface.html

@@ -203,7 +203,7 @@
         if (e.selectedIndex == -1) { return }
         var index = e.options[e.selectedIndex].value;
 
-        let theUrl = `${baseUrl}/indexes/${index}/search?q=${search.value}&attributesToHighlight=*`;
+        let theUrl = `${baseUrl}/indexes/${index}/search?q=${encodeURIComponent(search.value)}&attributesToHighlight=*`;
 
         if (lastRequest) { lastRequest.abort() }
         lastRequest = new XMLHttpRequest();