Add Linux icons back (Closes #1513)

packages/insomnia-app/app/renderer.html

@@ -11,7 +11,6 @@
   <body>
     <div id="root"></div>
     <div id="dropdowns-container" style="z-index:1000000;position:relative"></div>
-    <div id="environment-sort-container" class=".theme-sidebar"></div>
     <script src="bundle.js" type="application/javascript"></script>
   </body>
 </html>