message: Make tab name input always controlled
diff: @@ -66,7 +66,7 @@ class Tab extends React.PureComponent<Props & ReduxProps, State> {
  </Icons>
  {this.state.editingName ? (
  <OperationNameInput
  - value={session.name}
  + value={session.name || ''}
  onChange={this.handleEditName}
  onBlur={this.stopEditName}
  onKeyDown={this.handleKeyDown}
  