Merge pull request #390 from OpenTechFund/feature/237-menu-active-state

Update state of menu as active for any child page

opentech/public/navigation/templates/navigation/primarynav-apply-item.html

 <li class="nav__item" role="presentation">
     {% url url as target_url%}
-    <a class="nav__link {% if target_url == request.path %}nav__link--active{% endif %}" href="{{ target_url }}" role="menuitem">
+    <a class="nav__link {% if target_url in request.path %}nav__link--active{% endif %}" href="{{ target_url }}" role="menuitem">
         {{ name }}
     </a>
 </li>