message: Make the theme switcher switch between Element themes
diff: @@ -98,7 +98,7 @@ export default class UserMenu extends React.Component<IProps, IState> {
  if (theme.startsWith("custom-")) {
  return getCustomTheme(theme.substring("custom-".length)).is_dark;
  }
  - return theme === "dark";
  + return theme === "dark" || theme === "element-dark";
  }
  private onProfileUpdate = async () => {
  @@ -152,7 +152,7 @@ export default class UserMenu extends React.Component<IProps, IState> {
  // Disable system theme matching if the user hits this button
  SettingsStore.setValue("use_system_theme", null, SettingLevel.DEVICE, false);
  - const newTheme = this.state.isDarkTheme ? "light" : "dark";
  + const newTheme = this.state.isDarkTheme ? "element" : "element-dark";
  SettingsStore.setValue("theme", null, SettingLevel.DEVICE, newTheme); // set at same level as Appearance tab
  };
  