message: Fix backspace not working in the invite dialog
diff: @@ -805,7 +805,7 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
  private onKeyDown = (e) => {
  if (this.state.busy) return;
  - let handled = true;
  + let handled = false;
  const value = e.target.value.trim();
  const action = getKeyBindingsManager().getAccessibilityAction(e);
  @@ -815,21 +815,22 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
  // when the field is empty and the user hits backspace remove the right-most target
  this.removeMember(this.state.targets[this.state.targets.length - 1]);
  + handled = true;
  break;
  case KeyBindingAction.Space:
  if (!value || !value.includes("@") || value.includes(" ")) break;
  // when the user hits space and their input looks like an e-mail/MXID then try to convert it
  this.convertFilter();
  + handled = true;
  break;
  case KeyBindingAction.Enter:
  if (!value) break;
  // when the user hits enter with something in their field try to convert it
  this.convertFilter();
  + handled = true;
  break;
  - default:
  - handled = false;
  }
  if (handled) {
  