message: Don't send typing notification when restoring composer draft
diff: @@ -234,7 +234,8 @@ export default class BasicMessageEditor extends React.Component<IProps, IState>
  });
  this.historyManager.tryPush(this.props.model, selection, inputType, diff);
  - let isTyping = !this.props.model.isEmpty;
  + // inputType is falsy during initial mount, don't consider re-loading the draft as typing
  + let isTyping = !this.props.model.isEmpty && !!inputType;
  // If the user is entering a command, only consider them typing if it is one which sends a message into the room
  if (isTyping && this.props.model.parts[0].type === "command") {
  const { cmd } = parseCommandString(this.props.model.parts[0].text);
  