message: Resume reading default theme from config
diff: /*
  Copyright 2017 Travis Ralston
  +Copyright 2019 New Vector Ltd
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  @@ -27,7 +28,7 @@ export default class ConfigSettingsHandler extends SettingsHandler {
  // Special case themes
  if (settingName === "theme") {
  - return "dharma"; // config["default_theme"];
  + return config["default_theme"];
  }
  const settingsConfig = config["settingDefaults"];
  