message: unbreak keyboard shortcuts & ctrl-backspace
diff: @@ -716,7 +716,7 @@ export default class MessageComposerInput extends React.Component {
  if (ctrlCmdCommand) {
  return this.handleKeyCommand(ctrlCmdCommand);
  }
  - return false;
  + return;
  }
  switch (ev.keyCode) {
  @@ -739,6 +739,10 @@ export default class MessageComposerInput extends React.Component {
  };
  onBackspace = (ev: Event, change: Change): Change => {
  + if (ev.ctrlKey || ev.metaKey || ev.altKey || ev.ctrlKey || ev.shiftKey) {
  + return;
  + }
  +
  if (this.state.isRichTextEnabled) {
  // let backspace exit lists
  const isList = this.hasBlock('list-item');
  