Rework titles/texts on the add-device page

babybuddy/templates/babybuddy/user_add_device.html

@@ -11,16 +11,9 @@
 {% block content %}
     <h1>{% trans "Add a device" %}</h1>
 
-    <p>
-        {% blocktrans trimmed %}
-            This page allows you to gain access to babybuddy from a
-            third party app or device.
-        {% endblocktrans %}
-    </p>
-
     <div class="container-fluid">
+        <legend>{% trans "Authentication Methods" %}</legend>
         <fieldset>
-        <legend>{% trans "Device login options" %}</legend>
             <div class="form-group row">
                 <label class="col-sm-2 col-form-label">{% trans "Key" %}</label>
                 <div class="col-sm-10">