title: Blue dot appearing to left of user list
body: <p>I have this <code>render</code> function:</p>
  
  <pre><code>render() {
      const {classes} = this.props
      return (
        &lt;Paper className={classes.root} elevation={4}&gt;
          &lt;Typography type="title" className={classes.title}&gt;
            All Users
          &lt;/Typography&gt;
          &lt;List dense&gt;
           {this.state.users.map((item, i) =&gt; {
            const photoUrl = item._id
                ? `/api/users/photo/${item._id}?${new Date().getTime()}`
                : '/api/users/defaultphoto'
            return &lt;Link to={"/user/" + item._id} key={i}&gt;
                      &lt;ListItem button&gt;
                        &lt;ListItemAvatar&gt;
                          &lt;Avatar src={photoUrl} className={classes.bigAvatar}/&gt;
                        &lt;/ListItemAvatar&gt;
                        &lt;ListItemText primary={item.name}/&gt;
                        &lt;ListItemSecondaryAction&gt;
                        &lt;IconButton&gt;
                            &lt;ArrowForward/&gt;
                        &lt;/IconButton&gt;
                        &lt;/ListItemSecondaryAction&gt;
                      &lt;/ListItem&gt;
                   &lt;/Link&gt;
                 })
               }
          &lt;/List&gt;
        &lt;/Paper&gt;
      )
    }
  }
  </code></pre>
  
  <p>When I Initially load the page the below blue dot appears to the left of each user:</p>
  
  <p><a href="https://i.stack.imgur.com/weCBp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/weCBp.png" alt="enter image description here"></a></p>
  
  <p>If I then click a link to another page and then the browser back arrow to return to the Users page the user list appears without the blue dot:</p>
  
  <p><a href="https://i.stack.imgur.com/dRxTe.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dRxTe.png" alt="enter image description here"></a></p>
  
  <p>I would prefer if the blue dot never appears. How do I do this?</p>