wallet, interfaces, gui: Expose load_after_restore parameter

RestoreWallet has a load_after_restore parameter, expose this to callers
using it through the wallet interface as well.

src/interfaces/wallet.h

@@ -325,7 +325,7 @@ public:
     virtual std::string getWalletDir() = 0;
 
     //! Restore backup wallet
-    virtual util::Result<std::unique_ptr<Wallet>> restoreWallet(const fs::path& backup_file, const std::string& wallet_name, std::vector<bilingual_str>& warnings) = 0;
+    virtual util::Result<std::unique_ptr<Wallet>> restoreWallet(const fs::path& backup_file, const std::string& wallet_name, std::vector<bilingual_str>& warnings, bool load_after_restore) = 0;
 
     //! Migrate a wallet
     virtual util::Result<WalletMigrationResult> migrateWallet(const std::string& name, const SecureString& passphrase) = 0;

src/qt/walletcontroller.cpp

@@ -409,7 +409,7 @@ void RestoreWalletActivity::restore(const fs::path& backup_file, const std::stri
         tr("Restoring Wallet <b>%1</b>…").arg(name.toHtmlEscaped()));
 
     QTimer::singleShot(0, worker(), [this, backup_file, wallet_name] {
-        auto wallet{node().walletLoader().restoreWallet(backup_file, wallet_name, m_warning_message)};
+        auto wallet{node().walletLoader().restoreWallet(backup_file, wallet_name, m_warning_message, /*load_after_restore=*/true)};
 
         if (wallet) {
             m_wallet_model = m_wallet_controller->getOrCreateWallet(std::move(*wallet));

src/wallet/interfaces.cpp

@@ -597,16 +597,15 @@ public:
             return util::Error{error};
         }
     }
-    util::Result<std::unique_ptr<Wallet>> restoreWallet(const fs::path& backup_file, const std::string& wallet_name, std::vector<bilingual_str>& warnings) override
+    util::Result<std::unique_ptr<Wallet>> restoreWallet(const fs::path& backup_file, const std::string& wallet_name, std::vector<bilingual_str>& warnings, bool load_after_restore) override
     {
         DatabaseStatus status;
         bilingual_str error;
-        std::unique_ptr<Wallet> wallet{MakeWallet(m_context, RestoreWallet(m_context, backup_file, wallet_name, /*load_on_start=*/true, status, error, warnings))};
+        std::unique_ptr<Wallet> wallet{MakeWallet(m_context, RestoreWallet(m_context, backup_file, wallet_name, /*load_on_start=*/true, status, error, warnings, load_after_restore))};
-        if (wallet) {
+        if (!error.empty()) {
-            return wallet;
-        } else {
             return util::Error{error};
         }
+        return wallet;
     }
     util::Result<WalletMigrationResult> migrateWallet(const std::string& name, const SecureString& passphrase) override
     {