palette/views/jst/conversations/MessageFormDialog.mustache

<form class="compose_form" method="post"
      action="/conversations?submit={{id}}" class="form-horizontal new"
  >
  <div class="message-header">
    <input type="hidden" name="id" value="{{id}}"/>
    <input type="hidden" name="submit" value="1"/>

    <div class='message-header'>
      <div class='message-header-row'>
        <div class='message-header-label'>
          <label for="compose-message-subject">{{#t}}To{{/t}}</label>
        </div>
        <div class='message-header-input'>
          <input type="text" id="compose-message-subject" name="to"
                 class="message_subject"
                 value="{{recipient}}"
        </div>
      </div>

      <div class='message-header-row'>
        <div class='message-header-label'>
          <label for="compose-message-subject">{{#t}}Subject{{/t}}</label>
        </div>
        <div class='message-header-input'>
          <input type="text" id="compose-message-subject" name="subject"
                 class="message_subject"
                 value="{{subject}}"
                 placeholder="{{#t}}No subject{{/t}}">
        </div>
      </div>
    </div>
  </div>
  <hr class='header-separator' />

  <div class='message-body'>
    <textarea name="body"
              class="conversation_body">{{message}}</textarea>
    <div class='context_messages'></div>
  </div>

  <div class='attachments-pane'>
    <ul class='attachment_list' aria-label='{{#t}}Attachments{{/t}}' aria-live='polite'></ul>
  </div>

	<input type="submit"/>

</form>