Fix from address not showing when Send clicked from main view

Move renderSendTokenSelect to send.js so both the main view and
address detail view call it before navigating to send. Without it,
the token dropdown was stale and updateSendBalance had no context.

src/popup/views/send.js

@@ -4,6 +4,17 @@ const { $, showFlash, formatAddressHtml } = require("./helpers");
 const { state, currentAddress } = require("../../shared/state");
 const { getProvider } = require("../../shared/balances");
 
+function renderSendTokenSelect(addr) {
+    const sel = $("send-token");
+    sel.innerHTML = '<option value="ETH">ETH</option>';
+    for (const t of addr.tokenBalances || []) {
+        const opt = document.createElement("option");
+        opt.value = t.address;
+        opt.textContent = t.symbol;
+        sel.appendChild(opt);
+    }
+}
+
 function updateSendBalance() {
     const addr = currentAddress();
     if (!addr) return;
@@ -77,4 +88,4 @@ function init(ctx) {
     $("btn-send-back").addEventListener("click", ctx.showAddressDetail);
 }
 
-module.exports = { init, updateSendBalance };
+module.exports = { init, updateSendBalance, renderSendTokenSelect };