message: Hide composer buttons if we can't send events
diff: @@ -428,7 +428,7 @@ export default class MessageComposer extends React.Component<IProps, IState> {
  permalinkCreator={this.props.permalinkCreator} />
  <div className="mx_MessageComposer_row">
  { controls }
  - <MessageComposerButtons
  + { this.state.canSendMessages && <MessageComposerButtons
  addEmoji={this.addEmoji}
  haveRecording={this.state.haveRecording}
  isMenuOpen={this.state.isMenuOpen}
  @@ -446,7 +446,7 @@ export default class MessageComposer extends React.Component<IProps, IState> {
  showLocationButton={!window.electron}
  showStickersButton={this.state.showStickersButton}
  toggleButtonMenu={this.toggleButtonMenu}
  - />
  + /> }
  { showSendButton && (
  <SendButton
  key="controls_send"
  