message: Fix TextualBody.js to remove NodeList.forEach()
  Not all browsers support forEach() on NodeList objects. This causes crashes on some browsers, such as IE and FF<50.
diff: @@ -337,7 +337,7 @@ module.exports = React.createClass({
  _addCodeCopyButton() {
  // Add 'copy' buttons to pre blocks
  - ReactDOM.findDOMNode(this).querySelectorAll('.mx_EventTile_body pre').forEach((p) => {
  + Array.from(ReactDOM.findDOMNode(this).querySelectorAll('.mx_EventTile_body pre')).forEach((p) => {
  const button = document.createElement("span");
  button.className = "mx_EventTile_copyButton";
  button.onclick = (e) => {
  