Add back the choices, change the separator options

app/assets/javascripts/admin/components/list_setting_component.js

@@ -17,7 +17,7 @@ Discourse.ListSettingComponent = Ember.Component.extend({
     this.$("input").select2({
         multiple: false,
         separator: "|",
-        tokenSeparators: [",", " ", "|"],
+        tokenSeparators: ["|"],
         tags : this.get("choices") || [],
         width: 'off'
       }).on("change", function(obj) {

config/site_settings.yml

@@ -58,6 +58,15 @@ basic:
     refresh: true
     list: true
     default: 'latest|new|unread|starred|top|categories'
+    choices:
+     - latest
+     - new
+     - unread
+     - starred
+     - top
+     - categories
+     - read
+     - posted
   post_menu:
     client: true
     list: true