* Added party config `change_party_leader_samemap`
* Prevent changing the party leader if the specified player is not on the same map (Note 1)
* Default is `yes` as official does
* This config will be ignored by `party_changeleader` script command
* Thanks to @aleos89 and @Lemongrass3110
Signed-off-by: Cydh Ramdh <cydh@pservero.com>