File "electrum\gui\qt\main_window.py", line 695, in <lambda>
  File "electrum\gui\qt\util.py", line 688, in toggle_toolbar
  File "electrum\gui\qt\util.py", line 681, in show_toolbar
  File "electrum\gui\qt\address_list.py", line 114, in save_toolbar_state
  File "electrum\simple_config.py", line 160, in set_key
  File "electrum\simple_config.py", line 169, in _set_key_in_user_config
  File "electrum\simple_config.py", line 262, in save_user_config