File "electrum\gui\qt\main_window.py", line 563, in <lambda>
  File "electrum\gui\qt\util.py", line 588, in toggle_toolbar
  File "electrum\gui\qt\util.py", line 581, in show_toolbar
  File "electrum\gui\qt\history_list.py", line 441, in save_toolbar_state
  File "electrum\simple_config.py", line 149, in set_key
  File "electrum\simple_config.py", line 158, in _set_key_in_user_config
  File "electrum\simple_config.py", line 238, in save_user_config