message: Add option to also output original string
  This is useful for debugging and testing
diff: @@ -23,6 +23,10 @@ import SettingsStore, {SettingLevel} from "./settings/SettingsStore";
  const i18nFolder = 'i18n/';
  +// Control whether to also return original, untranslated strings
  +// Useful for debugging and testing
  +const ANNOTATE_STRINGS = false;
  +
  // We use english strings as keys, some of which contain full stops
  counterpart.setSeparator('|');
  // Fall back to English
  @@ -84,7 +88,21 @@ export function _t(text, variables, tags) {
  // The translation returns text so there's no XSS vector here (no unsafe HTML, no code execution)
  const translated = safeCounterpartTranslate(text, args);
  - return substitute(translated, variables, tags);
  + let substituted = substitute(translated, variables, tags);
  +
  + // For development/testing purposes it is useful to also output the original string
  + // Don't do that for release versions
  + if (ANNOTATE_STRINGS) {
  + if (typeof substituted === 'string') {
  + return `@@${text}##${substituted}@@`
  + }
  + else {
  + return <span className='translated-string' data-orig-string={text}>{substituted}</span>;
  + }
  + }
  + else {
  + return substituted;
  + }
  }
  /*
  