title: The Presets on Blocks isn't showing up until i manually add it in Shopify
body: <p>I have added presets inside blocks in Shopify in order to have 2 presets by default when i open the Customizer. But the presets aren't showing up unless i add them manually</p>
  
  <p>I tried looking at Shopify's documentation but still no luck the presets do not appear.</p>
  
  <pre><code>&lt;div id="section-cta"&gt;
  &lt;div class="section-header text-center"&gt;
  &lt;h3&gt;{{section.settings.text-box}}&lt;/h3&gt;
  &lt;/div&gt;
  
  {% for block in section.blocks %}
  &lt;div class="btn btn-primary"&gt;
  &lt;a href="{{block.settings.link}}" class="btn btn-primary"&gt; 
  {{block.settings.linktext}}&lt;/a&gt;
  
  &lt;/div&gt;
  {% endfor %}
  </code></pre>
  
  <p></p>
  
  <pre><code>{% schema %}
  {
  "name": "CTA Blocks",
  "max_blocks" : 3,
  "settings": [
  {
    "id" : "text-box",
    "type" : "text",
    "label" : "Heading",
    "default" : "Title"
  }
  ],
  "blocks":[
  {
  "type" : "select",
  "name" : "select",
  "settings" : [
  {
    "id" : "link",
    "type" : "url",
    "label" : "Button Link"
  },
  {
    "id" : "linktext",
    "type" : "text",
    "label" : "Button Here",
    "default" : "Click Here"
  }
  ]
  }
  
  ],
  "presets" : [
  {
    "name" : "Call to Action Blocks",
    "category" : "Call to Action Button",
    "blocks": [
    {
      "type" : "select"
    },
    {
      "type" : "select"
    }
  ]
    }
  ]
  }
  {% endschema %}
  </code></pre>
  
  <p>So here is the image for it</p>
  
  <p><a href="https://i.stack.imgur.com/wXQjN.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wXQjN.jpg" alt="enter image description here"></a></p>
  
  <p>There should have been 2 Add Button automatically right?</p>