cherry pick

index.html

@@ -357,7 +357,7 @@ $$$('#group_by', 'change', (e) => {
 
             for (let target of targets) {
                 for (let key of Object.keys(countries)) {
-                    if (target.predicate == null || target.predicate.includes(key)) {
+                    if (target.predicate.length == 0 || target.predicate.includes(key)) {
                         if (target.locale === locale) {
                             results[key] = countries[key];
                         }

main.py

@@ -61,7 +61,7 @@ class Greetings:
     @staticmethod
     def presets():
         return [
-            Greetings("en", "Europe/London", "Hello"  , "Good morning", "Good afternoon" , "Good evening", None),
+            Greetings("en", "Europe/London", "Hello"  , "Good morning", "Good afternoon" , "Good evening", []),
             Greetings("fr", "Europe/Paris" , "Bonjour", None          , "Bon après-midi" , "Bonsoir"     , ['法国', '比利时']),
             Greetings("de", "Europe/Berlin", "Hallo"  , "Guten Morgen", "Guten Tag"      , "Guten Abend" , ['德国', '奥地利', '瑞士']),
             Greetings("it", "Europe/Rome"  , "Ciao"   , "Buongiorno"  , "Buon pomeriggio", "Buonasera"   , ['意大利']),