message: Prevent enter to send edit weirdness when no change has been made
diff: @@ -292,6 +292,8 @@ class EditMessageComposer extends React.Component<IEditMessageComposerProps, ISt
  }
  private sendEdit = async (): Promise<void> => {
  + if (this.state.saveDisabled) return;
  +
  const startTime = CountlyAnalytics.getTimestamp();
  const editedEvent = this.props.editState.getEvent();
  