relocated manual refresh button

web/check.html

@@ -17,13 +17,9 @@ body {
   body { zoom: 1.2 }
 }
 b { color: #10B981 }
-form { display: inline }
 </style>
 </head>
 <body>
   {{.Receipt}}
-  <form>
-    <input type="submit" value="Manual check">
-  </form>
 </body>
 </html>

web/pay.html

@@ -23,9 +23,9 @@
   <blockquote>
   <img src="data:image/png;base64,{{.QRB64}}"/>
   </blockquote>
-  <label>Checking for payment (every 3 seconds)</label><br>
+  <label>Checking for payment (every 3 seconds) <a href="/check?{{.CheckURL}}" target="checkframe">Manual check</a></label><br>
   <blockquote>
-    <iframe allowtransparency="true" frameBorder="0" scrolling="no" src="/check?{{.CheckURL}}"></iframe>
+    <iframe allowtransparency="true" name="checkframe" frameBorder="0" scrolling="no" src="/check?{{.CheckURL}}"></iframe>
   </blockquote>
   <small>You must stay on this screen until transaction is seen. Do not manually refresh this page.</small><br>
 </body>