web_renderjs_ui: update comments about the reason for not using cache.addAll

The main reason for not using cache.addAll was to fill the cache as a low
priority task, not to generate too much traffic, the safari compatibility
was secondary. Now that safari seems to support cache.addAll, remove the
comment about safari.

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_serviceworker.js

@@ -21,20 +21,19 @@
     event.waitUntil(
       caches.open(CACHE_NAME)
         .then(function (cache) {
+          // Add all offline dependencies to the cache, one by one, to not
+          // hammer zopes.
           var promise = Promise.resolve();
 
           function append(url_to_cache) {
             promise = promise
               .then(function () {
-                // Use cache.add because safari does not support cache.addAll.
                 return cache.add(url_to_cache);
               });
           }
 
           len = required_url_list.length;
           for (i = 0; i < len; i += 1) {
-            // Add all offline dependencies to the cache
-            // One by one, to not hammer zopes
             append(required_url_list[i]);
           }
           return promise;

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_serviceworker.xml

@@ -256,7 +256,7 @@
                           </tuple>
                           <state>
                             <tuple>
-                              <float>1581435049.45</float>
+                              <float>1581435059.45</float>
                               <string>UTC</string>
                             </tuple>
                           </state>