Some attributes require propper combination.
stackDirHorizontal:right,styleClass:bottom
Common
Applicable only with nonblocking set to false.
Notify
NotifyMessages
Stack
Good combinations are :
- right,down,bottom,topLeft
- left,down,bottom,topRight
- right,up,bottom,bottomLeft
- left,up,bottom,bottomRight
Changing stack attributes is bad if messages are added
in ajax mode, because current widget implementation
does not allow to refresh messages styleClass that should be
borrowed from stack (this is done on server side)