Add an extra warning about not being able to access account if losing 2fa device.

src/profiles/templates/allauth_2fa/setup.html

@@ -7,6 +7,16 @@
 {% block profile_content %}
   <div class="row">
     <div class="col-md-12">
+      <div class="alert alert-danger">
+        <h4><strong>Attention!</strong></h4>
+        <p>
+          By setting up two-factor authentication you are securing your account from malicious entities.<br />
+          This means that only you (or a person with your password and two-factor device) can access your account.<br />
+          <br />
+          If you at any time lose you two-factor device, you <strong>will not be able to login to BornHack.dk</strong>.
+        </p>
+      </div>
+
       <div class="panel panel-default">
         <div class="panel-heading">
           <h4>Setup Two-Factor Authentication</h4>