ref(toolbar): show recording features based on explicit configs (#3080)

* ref(toolbar): show recording features based on explicit configs

* squash: bring back button configs, use final config names

* squash: update interfaceConfig comment, remove unused config whitelist

* squash: change order of button enabled checks to reduce diff

* squash: fileRecording -> fileRecordings

modules/UI/UI.js

@@ -351,7 +351,7 @@ UI.start = function() {
         APP.store.dispatch(setNotificationsEnabled(false));
     } else {
         // Initialize recording mode UI.
-        if (config.enableRecording && config.iAmRecorder) {
+        if (config.iAmRecorder) {
             VideoLayout.enableDeviceAvailabilityIcons(
                 APP.conference.getMyUserId(), false);