better large screen handling

app/templates/_base/sidenav.html.j2

@@ -1,6 +1,7 @@
 <ul class="sidenav sidenav-fixed" id="sidenav">
   {# user view #}
-  <li>
+  {# shown for small/medium devices #}
+  <li class="hide-on-large-only">
     <div class="user-view">
       <div class="background primary-color"></div>
       <a><img class="circle" src="{{ url_for('users.user_avatar', user_id=current_user.id) }}" alt=""></a>
@@ -9,6 +10,11 @@
     </div>
   </li>
 
+  {# fake-navbar #}
+  {# shown for large devices #}
+  <li class="primary-color z-depth-1 hide-on-med-and-down" style="height: 64px;">
+  </li>
+
   {# general items #}
   {# {% if current_user.can('USE_API') %}
   <li>