message: Use plaintext when loading a markdown history item into RT mode
diff: @@ -38,13 +38,11 @@ class HistoryItem {
  const contentState = convertFromRaw(this.rawContentState);
  if (outputFormat === 'markdown') {
  if (this.format === 'html') {
  - console.info(outputFormat, 'to other format');
  return ContentState.createFromText(RichText.stateToMarkdown(contentState));
  }
  } else {
  if (this.format === 'markdown') {
  - console.info(outputFormat, 'to other format');
  - return RichText.htmlToContentState(new Markdown(contentState).toHTML());
  + return RichText.htmlToContentState(new Markdown(contentState.getPlainText()).toHTML());
  }
  }
  // history item has format === outputFormat
  