This reverts commit 8d586161.

although these two have the same value

server will stop when host player leaves the game

* do not need stop server at duel end process

* update tag_duel.cpp

* add duel stage

* fix

* fix

* really retrying one when MSG_RETRY
* remove unnecessary retry paramter
* retry in single mode
* different hint for different action
* update retry hint

to avoid crash caused by clicking undo button twice in a very short time