Add extension pause toggle

extension/popup.html

@@ -137,6 +137,10 @@
     <button id="webInterfaceBtn" class="secondary">Web-Interface</button>
   </div>
 
+  <div class="btn-group">
+    <button id="pauseBtn" class="secondary">Extension pausieren</button>
+  </div>
+
   <script src="config.js"></script>
   <script src="popup.js"></script>
 </body>