message: Remove 0 on graph screen when no namespace is selected
  - We need to use booleans when doing conditional rendering to avoid
  passing the raw values to react.
diff: @@ -291,7 +291,7 @@ export default class GraphPage extends React.Component<GraphPageProps, GraphPage
  <Icon title="Help" type="pf" name="help" />
  </Button>
  </Breadcrumb.Item>
  - {this.props.graphTimestamp && (
  + {this.props.graphTimestamp > 0 && (
  <span className={'pull-right'}>
  {new Date(graphStart).toLocaleDateString(undefined, timeDisplayOptions)}
  {' ... '}
  