title: Activate router-link that has multi level nested routes with CRUD setup
body: <p>I trying to setup deep nesting like below, and I am kinda sure about we cannot use <code>exact</code> in <code>router-link</code> for nested routes.</p>
  
  <pre><code>&lt;div id="app"&gt;
    &lt;nav class="nav nav-main"&gt;
      &lt;router-link exact to="/" class="nav-link" activeClass="active"&gt;Dashboard&lt;/router-link&gt;
      &lt;router-link to="/projects" class="nav-link" activeClass="active"&gt;Projects&lt;/router-link&gt;
    &lt;/nav&gt;
  
    &lt;div class="parent-content"&gt;
      &lt;h4&gt;Content for Parent goes here&lt;/h4&gt;
    &lt;/div&gt;
  
    &lt;router-view&gt;
      &lt;nav class="nav nav-main"&gt;
        &lt;router-link :to="'/projects/' + $route.params.projectId" class="nav-link" activeClass="active"&gt;Deals&lt;/router-link&gt;
        &lt;router-link :to="'/projects/' + $route.params.projectId + '/commitments/'" class="nav-link" activeClass="active"&gt;Commitments&lt;/router-link&gt;
      &lt;/nav&gt;
      &lt;router-view&gt;
        &lt;div class="child-content"&gt;
          &lt;h4&gt;Content for Child goes here&lt;/h4&gt;
        &lt;/div&gt;
      &lt;/router-view&gt;
    &lt;/router-view&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>My Route: </p>
  
  <pre><code>routes: [
    {
      path: '/',
      component: Dashboard
    },
    {
      path: '/projects',
      component: Projects
    },
    {
      path: '/projects/:id',
      name: 'projects-detail',
      component: ProjectDetails,
      children: [
        // DEALS
        {
          path: '/projects/:projectId/deals',
          component: Deals
        },
        {
          path: '/projects/:projectId/deals/:dealId/details',
          component: DealDetails
        },
        // COMMITMENTS
        {
          path: '/projects/:projectId/deals/:dealId/commitments/:commitmentId/edit',
          component: CommitmentEdit
        }
      ]
    }
  ]
  </code></pre>
  
  <p>With the above setup, I need to activate router-links, when the route is:<br>
  <code>/projects/:projectId/deals/:dealId/details</code> then activate <code>Deals</code><br>
  <code>/projects/:projectId/deals/:dealId/commitments/:commitmentId/edit</code> then activate <code>Commitments</code></p>