only show advanced settings section if there are any pre-release features

web/react/utils/constants.jsx

@@ -398,5 +398,6 @@ export default {
     },
     NotificationPrefs: {
         MENTION: 'mention'
-    }
+    },
+    FeatureTogglePrefix: 'feature_enabled_'
 };

web/react/utils/utils.jsx

@@ -1223,5 +1223,5 @@ export function getPostTerm(post) {
 }
 
 export function featureToggle(feature) {
-    return PreferenceStore.getPreference(Constants.Preferences.CATEGORY_ADVANCED_SETTINGS, 'feature_enabled_' + feature, {value: 'false'}).value === 'true';
+    return PreferenceStore.getPreference(Constants.Preferences.CATEGORY_ADVANCED_SETTINGS, Constants.FeatureTogglePrefix + feature, {value: 'false'}).value === 'true';
 }