[broken] jr: add spend feature

It does not work right now, and the blocker right now is that the public node
has debug endpoints turned off. No idea if it would work if said endpoints were
turned on.

jrx/pages/popup.html

@@ -141,6 +141,30 @@
 </div>
 
 
+<!-- spend -->
+<div class="psection">
+    <table >
+        <tr>
+            <td><img src="../art/keypair.svg" style="width: 32px; height: 32px;"></td>
+            <td style="justify-content: center; font-size: 28px; text-align: center; font-weight: bold">
+                SEND SOMEONE MONEY
+            </td>
+        </tr>
+    </table>
+
+    <form id="spend-params">
+        <label for="spend-recipient">Recipient Address:</label>
+        <input id="spend-recipient"></input>
+        <br>
+        <label for="spend-amount">Amount (gattos):</label>
+        <input id="spend-amount"></input>
+        <br>
+        <button type="button" id="spend-btn">Send</button>
+    </form>
+
+    <p id='spend-result'></p>
+</div>
+
 
 
 <pre id="scratch"></pre>