use @zindex-modal for .modal and @zindex-modal-background for .modal-backdrop. removed z-index for .modal-dialog, it was not necessary because the parent element (.modal) already has a z-index.
use @zindex-modal for .modal and @zindex-modal-background for .modal-backdrop.
removed z-index for .modal-dialog, it was not necessary because the parent element (.modal) already has a z-index.

ammula88/bootstrap,ammula88/bootstrap,ammula88/bootstrap,ammula88/bootstrap