qt: wizard: pass wallet_type to Keystore wizard via initial viewstate

diff --git a/electrum/gui/qt/wallet_info_dialog.py b/electrum/gui/qt/wallet_info_dialog.py
index 7ba9bb6..9d6a26c 100644
--- a/electrum/gui/qt/wallet_info_dialog.py
+++ b/electrum/gui/qt/wallet_info_dialog.py
@@ -14,6 +14,7 @@ from PyQt6.QtWidgets import (
 from electrum.plugin import run_hook
 from electrum.i18n import _
 from electrum.wallet import Multisig_Wallet
+from electrum.wizard import WizardViewState
 
 from .main_window import protected
 from electrum.gui.qt.wizard.wallet import QEKeystoreWizard
@@ -192,7 +193,9 @@ class WalletInfoDialog(WindowModalDialog):
         self.window.gui_object.reload_windows()
 
     def enable_keystore(self, b: bool):
-        dialog = QEKeystoreWizard(self.window.config, self.window.wallet.wallet_type, self.window.gui_object.app, self.window.gui_object.plugins)
+        v = WizardViewState('keystore_type', {'wallet_type': self.window.wallet.wallet_type}, {})
+        dialog = QEKeystoreWizard(config=self.window.config, app=self.window.gui_object.app,
+                                  plugins=self.window.gui_object.plugins, start_viewstate=v)
         result = dialog.run()
         if not result:
             return
diff --git a/electrum/gui/qt/wizard/wallet.py b/electrum/gui/qt/wizard/wallet.py
index bae3ef9..839d6a8 100644
--- a/electrum/gui/qt/wizard/wallet.py
+++ b/electrum/gui/qt/wizard/wallet.py
@@ -23,7 +23,7 @@ from .wizard import QEAbstractWizard, WizardComponent
 from electrum.logging import get_logger, Logger
 from electrum import WalletStorage, mnemonic, keystore
 from electrum.wallet_db import WalletDB
-from electrum.wizard import NewWalletWizard, KeystoreWizard
+from electrum.wizard import NewWalletWizard, KeystoreWizard, WizardViewState
 
 from electrum.gui.qt.bip39_recovery_dialog import Bip39RecoveryDialog
 from electrum.gui.qt.password_dialog import PasswordLayout, PW_NEW, MSG_ENTER_PASSWORD, PasswordLayoutForHW
@@ -51,10 +51,18 @@ MSG_HW_STORAGE_ENCRYPTION = _("Set wallet file encryption.") + '\n'\
 class QEKeystoreWizard(KeystoreWizard, QEAbstractWizard, MessageBoxMixin):
     _logger = get_logger(__name__)
 
-    def __init__(self, config: 'SimpleConfig', wallet_type: str, app: 'QElectrumApplication', plugins: 'Plugins', *, start_viewstate=None):
+    def __init__(
+            self,
+            *,
+            config: 'SimpleConfig',
+            app: 'QElectrumApplication',
+            plugins: 'Plugins',
+            start_viewstate: WizardViewState = None
+    ):
+        assert 'wallet_type' in start_viewstate.wizard_data, 'wallet_type required'
+
         QEAbstractWizard.__init__(self, config, app, start_viewstate=start_viewstate)
         KeystoreWizard.__init__(self, plugins)
-        self._wallet_type = wallet_type
         self.window_title = _('Extend wallet keystore')
         # attach gui classes to views
         self.navmap_merge({
@@ -417,9 +425,7 @@ class WCKeystoreType(WalletWizardComponent):
         self.wizard_data['keystore_type'] = self.choice_w.selected_key
 
 
-
 class WCExtendKeystore(WalletWizardComponent):
-
     def __init__(self, parent, wizard):
         WalletWizardComponent.__init__(self, parent, wizard, title=_('Keystore'))
         message = _('What type of signing method do you want to add?')
@@ -431,13 +437,10 @@ class WCExtendKeystore(WalletWizardComponent):
         self.layout().addWidget(self.choice_w)
         self.layout().addStretch(1)
         self._valid = True
-        self.wizard_data['wallet_type'] = self._wallet_type = wizard._wallet_type
 
     def apply(self):
-        self.wizard_data['wallet_type'] = self._wallet_type
         self.wizard_data['keystore_type'] = self.choice_w.selected_key
-        if multisig_type(self._wallet_type):
-            self.wizard_data['wallet_type'] = self._wallet_type = 'multisig'
+        if multisig_type(self.wizard_data['wallet_type']):
             self.wizard_data['multisig_participants'] = 2
             self.wizard_data['multisig_signatures'] = 2
             self.wizard_data['multisig_cosigner_data'] = {}