palette/views/jst/messageStudentsDialog.handlebars

<div class="message-students-dialog form-dialog-content">
  <div class="message-recipients-group-container">
    <label for="message-recipients-group">
     {{#t "recipients"}}Recipients:{{/t}}
    </label>

    {{#ifEqual recipientGroups.length 1}}
      {{recipientGroups.0.name}}
      <input type="hidden" name="recipientGroupName" value="{{recipientGroups.0.name}}" />
    {{else}}
      <select name="recipientGroupName" id="message-recipients-group">
        {{#each recipientGroups}}
          <option value="{{name}}">{{name}}</option>
        {{/each}}
      </select>
    {{/ifEqual}}
  </div>

  <div id="message-recipients">
    {{> messageStudentsWhoRecipientList this}}
  </div>

  <textarea name=body></textarea>

</div>
<div class="form-controls">
  <button class="btn dialog_closer btn-secondary" type="button"
    data-text-while-loading='{{#t "#buttons.sending"}}Sending...{{/t}}'>
    {{#t "#buttons.cancel"}}Cancel{{/t}}
  </button>
  <button class="btn btn-primary"
    data-text-while-loading='{{#t "#buttons.sending"}}Sending...{{/t}}'
    data-text-when-loaded='{{#t "#buttons.sent"}}Sent!{{/t}}'>
    {{#t "#buttons.send_message"}}Send Message{{/t}}
  </button>

</div>