Fix TextualBody.js to remove NodeList.forEach()
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.
matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,aperezdc/matrix-react-sdk,aperezdc/matrix-react-sdk,matrix-org/matrix-react-sdk,aperezdc/matrix-react-sdk,matrix-org/matrix-react-sdk,aperezdc/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk