add dropdown menu for admin

homepage/navbar.template.html

@@ -12,12 +12,15 @@
             <ul class="navbar-nav">
             {{- if .User }}
                 {{- if .User.IsAdmin }}
-                <li class="nav-item">
-                    <a class="nav-link" href="/admin">Admin</a>
-                </li>
-                    <li class="nav-item">
+                <li class="nav-item dropdown">
+                    <a class="dropdown-toggle nav-link" href="#" id="admin_menu" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+                            Admin
+                    </a>
+                    <div class="dropdown-menu bg-dark" aria-labelledby="menu">
+                        <a class="nav-link" href="/admin">Admin oldal</a>
                         <a class="nav-link" href="/topup">Feltöltés</a>
-                    </li>
+                    </div>
+                </li>
                 {{- else }}
                     <li class="nav-item">
                         <a class="nav-link" href="#" onclick="alert('Keresd a reszort gazdaságist!')">Feltöltés</a>