message: Strip out "/me" after committing to RTE history
  So that history can include emotes
  Fixes
diff: @@ -548,14 +548,6 @@ export default class MessageComposerInput extends React.Component {
  let sendHtmlFn = this.client.sendHtmlMessage;
  let sendTextFn = this.client.sendTextMessage;
  - if (contentText.startsWith('/me')) {
  - contentText = contentText.substring(4);
  - // bit of a hack, but the alternative would be quite complicated
  - if (contentHTML) contentHTML = contentHTML.replace(/\/me ?/, '');
  - sendHtmlFn = this.client.sendHtmlEmote;
  - sendTextFn = this.client.sendEmoteMessage;
  - }
  -
  if (this.state.isRichtextEnabled) {
  this.historyManager.addItem(
  contentHTML ? contentHTML : contentText,
  @@ -566,6 +558,14 @@ export default class MessageComposerInput extends React.Component {
  this.historyManager.addItem(contentText, 'markdown');
  }
  + if (contentText.startsWith('/me')) {
  + contentText = contentText.substring(4);
  + // bit of a hack, but the alternative would be quite complicated
  + if (contentHTML) contentHTML = contentHTML.replace(/\/me ?/, '');
  + sendHtmlFn = this.client.sendHtmlEmote;
  + sendTextFn = this.client.sendEmoteMessage;
  + }
  +
  let sendMessagePromise;
  if (contentHTML) {
  sendMessagePromise = sendHtmlFn.call(
  