code: function appendChild(parent, element) {
      parent = getComponentNode(parent) || parent;
      element = getComponentNode(element) || element;
      if (parent !== element.parentNode || parent.lastElementChild !== element) {
          if (element.parentNode) {
              removeChild(element.parentNode, element);
          }
          parent.appendChild(element);
          return connect(element);
      }
      return false;
  }
docs: Dynamically append a node and call the `connectedCallback`.
  - disconnect the node if already in the tree
  - connect the node after the insertion
  @method appendChild
  @memberof DNA.DOM
  @static
  
  @param {HTMLElement} parent The parent element.
  @param {HTMLElement} element The element to append.
  @return {Boolean} The node has been appended.