title: Document create displayAnchors are being ignored
body: <p>I am attempting to create a responsive signing envelope using the htmlDefinition property in a document. </p>
  
  <p>I have tried v2 and v2.1 with the same code.  </p>
  
  <pre><code>"documents": [
          {
              "documentBase64": "JVBERi0x...mCjIzMzMzCiUlRU9GCg==",
              "documentId": "1",
              "fileExtension": "pdf",
              "htmlDefinition": {
                  "displayAnchors": [
                      {
                          "caseSensitive": true,
                          "displaySettings": {
                              "display": "collapsed",
                              "displayLabel": "Person 1"
                          },
                          "endAnchor": "$$$$E1",
                          "removeEndAnchor": true,
                          "removeStartAnchor": true,
                          "startAnchor": "$$$$S1"
                      },
                      {
                          "caseSensitive": true,
                          "displaySettings": {
                              "display": "collapsed",
                              "displayLabel": "Person 2"
                          },
                          "endAnchor": "$$$$E2",
                          "removeEndAnchor": true,
                          "removeStartAnchor": true,
                          "startAnchor": "$$$$S2"
                      },
                      {
                          "caseSensitive": true,
                          "displaySettings": {
                              "display": "collapsed",
                              "displayLabel": "Person 3"
                          },
                          "endAnchor": "$$$$E3",
                          "removeEndAnchor": true,
                          "removeStartAnchor": true,
                          "startAnchor": "$$$$S3"
                      }
                  ],
                  "showMobileOptimizedToggle": "true",
                  "source": "document"
              },
              "name": "HTML Test",
              "order": "1"
          }
  </code></pre>
  
  <p>The envelope is created with the document.  Tabs are correctly placed but no sections are created.</p>