closes #1 Fix active menu in angularjs branch

springboot-petclinic-client/src/scripts/fragments/nav.html

@@ -10,14 +10,14 @@
         </div>
         <div class="navbar-collapse collapse" id="main-navbar">
             <ul class="nav navbar-nav navbar-right">
-                <li class="active">
+                <li ui-sref-active="active">
                     <a ui-sref="welcome" title="home page">
                         <span class="glyphicon glyphicon-home" aria-hidden="true"></span>
                         <span>Home</span>
                     </a>
                 </li>
 
-                <li class="dropdown">
+                <li ui-sref-active="active" class="dropdown">
                     <a href="javascript:void(0)" class="dropdown-toggle" data-toggle="dropdown" role="button"
                        aria-haspopup="true" aria-expanded="false">Owners<span class="caret"></span>
                     </a>
@@ -27,7 +27,7 @@
                     </ul>
                 </li>
 
-                <li class="">
+                <li ui-sref-active="active">
                     <a ui-sref="vets" title="veterinarians">
                         <span class="glyphicon glyphicon-th-list" aria-hidden="true"></span>
                         <span>Veterinarians</span>