Removed useless popup + 3rd job Cygnus revamp + droplimit command

Removed the Stat Upgrade UI that would popup when leveling up to 15/20/25/30.
Improved 3rd job advancement for Cygnus Knights, now working GMS-like.
Added "droplimit" command. When issued, it will show to the player the current drop count on the map.

scripts/npc/commands.js

@@ -197,6 +197,7 @@ function writeSolaxiaCommandsLv0() {    //Common
         desc_cursor = desc_lv0;
 
         addCommand("commands", "");
+        addCommand("droplimit", "");
         addCommand("time", "");
         addCommand("credits", "");
         addCommand("uptime", "");