emoji selectorの構造
code:window.html
<div class="form-group" style="position: absolute; top: 117px;">
<div class="dropdown">
<ul class="dropdown-menu">
<li class="dropdown-item">
<a tabindex="0">
<img src="/api/pages/{PROJECT_NAMR}/{PAGE_TITLE}/icon" class="icon" style="height: 17px; float: left;">
<div> :firebase:</div>
</a>
</li>
<li>
...
</li>
</ul>
</div>
</div>