wizard: fix crash when decrypting wallet hw device

E | __main__ | daemon.run_gui errored
Traceback (most recent call last):
  File ".../electrum/run_electrum", line 379, in <module>
    d.run_gui(config, plugins)
  File "...\electrum\electrum\daemon.py", line 522, in run_gui
    self.gui_object.main()
  File "...\electrum\electrum\gui\qt\__init__.py", line 362, in main
    if not self.start_new_window(path, self.config.get('url'), app_is_starting=True):
  File "...\electrum\electrum\gui\qt\__init__.py", line 246, in wrapper
    return func(self, *args, **kwargs)
  File "...\electrum\electrum\gui\qt\__init__.py", line 270, in start_new_window
    wallet = self._start_wizard_to_select_or_create_wallet(path)
  File "...\electrum\electrum\gui\qt\__init__.py", line 308, in _start_wizard_to_select_or_create_wallet
    path, storage = wizard.select_storage(path, self.daemon.get_wallet)
  File "...\electrum\electrum\gui\qt\installwizard.py", line 334, in select_storage
    pw_e.clear()
  File "...\electrum\electrum\gui\qt\util.py", line 759, in clear
    self.setText(len(self.text()) * " ")
RuntimeError: wrapped C/C++ object of type PasswordLineEdit has been deleted

electrum/gui/qt/installwizard.py

@@ -331,7 +331,10 @@ class InstallWizard(QDialog, MessageBoxMixin, BaseWizard):
         try:
             run_user_interaction_loop()
         finally:
-            pw_e.clear()
+            try:
+                pw_e.clear()
+            except RuntimeError:  # wrapped C/C++ object has been deleted.
+                pass              # happens when decrypting with hw device
 
         return temp_storage.path, (temp_storage if temp_storage.file_exists() else None)