Bug fix, sound notification, sell all function, top/bottom buttons; get post url function, maze confirmation

Added confirmation on maze exit.
CSS/JS bug fix.
Added sound notification on battle start.
Added "sell all resources" function in resource shop.
Added top/bottom buttons on a forum.
Added "get post url" button on forum.
Fixed Advertisment bugs in chat
Fixed resource icons in backpack.
FIxed IP information bug on a forum (for moderators).
Added link to user for system message in chat