Merge #16826: Do additional character escaping for wallet names and address labels

ad52f054f6 Escape ampersands (&) in wallet names in Open Wallet menu (Andrew Chow)
2c530ea2ad HTML escape address labels in more dialogs and notifications (Andrew Chow)
1770a972d4 HTML escape the wallet name in more dialogs and notifications (Andrew Chow)

Pull request description:

  Fixes some places where wallet names and address labels which contain valid html or other interpreted characters are displayed incorrectly.

  In the send coins dialog, if the wallet name or the address label contains valid html, then the html would be shown rather than the literal string for the wallet name or label. This PR fixes that so the true name or label is shown.

  The Open Wallet menu would incorrectly show wallet names with ampersands (`&`). For some reason, Qt removes the first ampersand in a string. So by replacing the first ampersand with 2 ampersands, the correct number of ampersands will be shown.

  Fixes the HTML escaping issues in #16820

ACKs for top commit:
  laanwj:
    Untested ACK, thanks for adding proper escaping, ad52f054f6
  fanquake:
    ACK ad52f054f6

Tree-SHA512: 264bef28a8061c7f43cc30c3e04b361c614ea78b9915e8763c44553c8967131b066db500977fa6130de1f8874b9bba59e630486c58e1e3c5c165555105a6c254

src/qt/bitcoingui.cpp

@@ -375,6 +375,8 @@ void BitcoinGUI::createActions()
             for (const std::pair<const std::string, bool>& i : m_wallet_controller->listWalletDir()) {
                 const std::string& path = i.first;
                 QString name = path.empty() ? QString("["+tr("default wallet")+"]") : QString::fromStdString(path);
+                // Menu items remove single &. Single & are shown when && is in the string, but only the first occurrence. So replace only the first & with &&
+                name.replace(name.indexOf(QChar('&')), 1, QString("&&"));
                 QAction* action = m_open_wallet_menu->addAction(name);
 
                 if (i.second) {