use constants for keycodes in RTE

src/components/views/rooms/MessageComposerInput.js

@@ -46,6 +46,8 @@ import * as RichText from '../../../RichText';

const TYPING_USER_TIMEOUT = 10000, TYPING_SERVER_TIMEOUT = 30000;

const KEY_M = 77;

// FIXME Breaks markdown with multiple paragraphs, since it only strips first and last <p>
function mdownToHtml(mdown) {
    var html = marked(mdown) || "";
@@ -85,7 +87,7 @@ export default class MessageComposerInput extends React.Component {

    static getKeyBinding(e: SyntheticKeyboardEvent): string {
        // C-m => Toggles between rich text and markdown modes
        if(e.keyCode == 77 && KeyBindingUtil.isCtrlKeyCommand(e)) {
        if(e.keyCode == KEY_M && KeyBindingUtil.isCtrlKeyCommand(e)) {
            return 'toggle-mode';
        }