message: only show "can't redact" dialog when not a network error
  as the redaction is queued now and might be sent later
diff: @@ -119,19 +119,28 @@ module.exports = React.createClass({
  onRedactClick: function() {
  const ConfirmRedactDialog = sdk.getComponent("dialogs.ConfirmRedactDialog");
  Modal.createTrackedDialog('Confirm Redact Dialog', '', ConfirmRedactDialog, {
  - onFinished: (proceed) => {
  + onFinished: async (proceed) => {
  if (!proceed) return;
  const cli = MatrixClientPeg.get();
  - cli.redactEvent(this.props.mxEvent.getRoomId(), this.props.mxEvent.getId()).catch(function(e) {
  + try {
  + await cli.redactEvent(
  + this.props.mxEvent.getRoomId(),
  + this.props.mxEvent.getId(),
  + );
  + } catch (e) {
  + const code = e.errcode || e.statusCode;
  + // only show the dialog if failing for something other than a network error
  + // (e.g. no errcode or statusCode)
  + if (typeof code !== "undefined") {
  const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
  // display error message stating you couldn't delete this.
  - const code = e.errcode || e.statusCode;
  Modal.createTrackedDialog('You cannot delete this message', '', ErrorDialog, {
  title: _t('Error'),
  description: _t('You cannot delete this message. (%(code)s)', {code}),
  });
  - }).done();
  + }
  + }
  },
  }, 'mx_Dialog_confirmredact');
  this.closeMenu();
  