Concurrency fix + new scripts

Fixed some situation involving concurrency upon using getCharacters()
from MapleMap, added scripts and other bug fixes.

wz/Item.wz/Etc/0400.img.xml

@@ -7340,6 +7340,7 @@
       </canvas>
       <int name="price" value="1"/>
       <int name="only" value="1"/>
+      <int name="quest" value="1"/>
     </imgdir>
   </imgdir>
   <imgdir name="04001112">