Remove target='_blank' from QR code link

Author: antonmedv

index.html

@@ -234,7 +234,7 @@
 </button>
 <div id="menu">
   <a class="item" href="#new" target="_blank">New document</a>
-  <a class="item" id="qr" href="/qr" target="_blank">Generate QR code</a>
+  <a class="item" id="qr" href="/qr">Generate QR code</a>
   <a class="item" href="https://github.com/antonmedv/textarea" target="_blank">GitHub</a>
 </div>
 <script>