.position_children_center{position:absolute;top:50%}[dir] .position_children_center{margin:0}[dir=ltr] .position_children_center{left:50%;margin-right:-50%;transform:translate(-50%,-50%)}[dir=rtl] .position_children_center{right:50%;margin-left:-50%;transform:translate(50%,-50%)}#save_btn{position:relative}#save_btn .con-vs-loading{position:absolute}