fix: the address screen shows a token just added at its fetched balance, not 0.0000 (closes #516)

A balance refresh that returns now draws the balances on AddressDetail or
AddressToken again when that screen is up, not only the wallet list. Their
transaction lists are left alone.

Every add path on AddToken and SettingsAddToken tracks a token through
trackToken(), which gives the tracked record `balanceNotFetched: true`. While
the field is set, the token's line reads `quantity unknown` instead of 0.0000.
refreshBalances() now resolves with the tracked tokens whose balance it read
at every address. The popup's refresh deletes the field from those tokens in
the stored record and leaves the rest of the stored list as it is. Removing
the token removes the field, and each network keeps its own records.

Model: opus-5-5

src/popup/views/addressDetail.js

@@ -66,11 +66,27 @@ function show() {
     });
     $("address-line").dataset.full = addr.address;
     attachCopyHandlers($("address-line"));
-    const usdTotal = formatAddressTotal(getAddressValue(addr));
-    $("address-usd-total").innerHTML = escapeHtml(usdTotal) || " ";
     const ensEl = $("address-ens");
     // ENS is now shown inside renderAddressHtml, hide the separate element
     ensEl.classList.add("hidden");
+    renderBalances();
+    // Only Blockscout reports the tokens the user has not tracked.
+    $("address-tokens-note").classList.toggle("hidden", !!state.useBlockscout);
+    renderSendTokenSelect(addr);
+    $("tx-list").innerHTML =
+        '<div class="text-muted text-xs py-1">Loading...</div>';
+    showView("address");
+    loadTransactions(addr.address);
+}
+
+// The USD total and the balance list. Drawn again by each balance refresh
+// that returns while this screen is up (doRefreshAndRender() in
+// src/popup/index.js), which leaves the rest of the screen as it is.
+function renderBalances() {
+    const addr =
+        state.wallets[state.selectedWallet].addresses[state.selectedAddress];
+    const usdTotal = formatAddressTotal(getAddressValue(addr));
+    $("address-usd-total").innerHTML = escapeHtml(usdTotal) || "&nbsp;";
     $("address-balances").innerHTML = balanceLinesForAddress(
         addr,
         state.trackedTokens,
@@ -84,13 +100,6 @@ function show() {
                 ctx.showAddressToken();
             });
         });
-    // Only Blockscout reports the tokens the user has not tracked.
-    $("address-tokens-note").classList.toggle("hidden", !!state.useBlockscout);
-    renderSendTokenSelect(addr);
-    $("tx-list").innerHTML =
-        '<div class="text-muted text-xs py-1">Loading...</div>';
-    showView("address");
-    loadTransactions(addr.address);
 }
 
 let loadedTxs = [];
@@ -287,4 +296,4 @@ function init(_ctx) {
     exportPrivkey.init();
 }
 
-module.exports = { init, show };
+module.exports = { init, show, renderBalances };