message: Fix JS error on role bindings page.
  Go to create a role binding.
  Select a role. (not a cluster role)
  Change the radio button at the top to create a ClusterRoleBinding.
  Boom JS error.
diff: @@ -249,8 +249,11 @@ class ListDropdown_ extends React.Component {
  if (selectedKey) {
  const item = state.items[selectedKey];
  + // item may not exist if selectedKey is a role and then user switches to creating a ClusterRoleBinding
  + if (item) {
  state.title = <ResourceName kind={item.kindLabel} name={item.name} />;
  }
  + }
  this.setState(state);
  }
  