potential bugfix and better error logging concerning strict_menu()

- fixed a potential bug if update_orders_list() isn't called soon enough
- improved the error logging of strict_menu()
- renamed ORDERS_LIST to a lowercase name because it isn't a constant anymore
- grouped menu() and strict_menu() duplicate code
bug fixed: force quitting a game (by asking a second time) didn't work
added optional user folder to .gitignore
updated Russian translation

thanks to Kvark