Follow up 6990db954cf46c51e9f522865a03d5d3b64cb46a

it turned out this wouldn't allow one to close his own buying store after refresh, will maintain the previous behavior instead.

Signed-off-by: shennetsind <ind@henn.et>
Dropped char_per_account char-server config

It became pointless, since 0241d0195558b7e57d2181f2f097cf774a1ef463 introduced a more accurate way to control the amount of characters in an account.
This update also reduced the amount of mysql queries used on char creation by 2.

Signed-off-by: shennetsind <ind@henn.et>