Code review changes

app/assets/javascripts/dispatcher.js.es6

@@ -84,7 +84,7 @@
           break;
         case 'projects:merge_requests:index':
         case 'projects:issues:index':
-          if (document.querySelector('.filtered-search') && gl.FilteredSearchManager) {
+          if (gl.FilteredSearchManager) {
             new gl.FilteredSearchManager();
           }
           Issuable.init();

app/assets/javascripts/droplab/droplab_ajax.js

@@ -39,7 +39,7 @@ require('../window')(function(w){
 
         var loadingTemplate = document.createElement('div');
         loadingTemplate.innerHTML = config.loadingTemplate;
-        loadingTemplate.setAttribute('data-loading-template', true);
+        loadingTemplate.setAttribute('data-loading-template', '');
 
         this.listTemplate = dynamicList.outerHTML;
         dynamicList.outerHTML = loadingTemplate.outerHTML;

app/assets/javascripts/filtered_search/filtered_search_tokenizer.js.es6

 (() => {
   class FilteredSearchTokenizer {
     static processTokens(input) {
+      // Regex extracts `(token):(symbol)(value)`
+      // Values that start with a double quote must end in a double quote (same for single)
       const tokenRegex = /(\w+):([~%@]?)(?:('[^']*'{0,1})|("[^"]*"{0,1})|(\S+))/g;
       const tokens = [];
       let lastToken = null;