fix keystore in trezor settings

plugins/trezor/qt_generic.py

@@ -349,11 +349,11 @@ class SettingsDialog(WindowModalDialog):
 
         devmgr = plugin.device_manager()
         config = devmgr.config
-        keystore = window.wallet.get_keystore()
+        wallet = window.wallet
         handler = keystore.handler
         thread = keystore.thread
         # wallet can be None, needn't be window.wallet
-        wallet = devmgr.wallet_by_id(device_id)
+        keystore = devmgr.wallet_by_id(device_id)
         hs_rows, hs_cols = (64, 128)
 
         def invoke_client(method, *args, **kw_args):