title: Insert custom html into quill editor
body: <p>I use Quill for my send mail form and in my toolbar I have a drop down with the signatures.
  When I select a signature I have to insert custom and complex html code (formatted and with img) in the editor, when I change signature I have to replace inserted html code.</p>
  
  <p>I inserted the code in a p tag specifing the id but Quill cleans the code also deleting the id so i can't find the p tag.</p>
  
  <p>I need to preserve the html code and the id.</p>
  
  <p>Someone could help me?
  Please.</p>