.EditingArea .MapContainer
{
    position:relative;
    border:1px dotted green;
    max-width:100%;
}

.EditingArea .MapContainer .MapMask
{
    position:absolute;
    left:0%;
    top:0%;
    width:100%;
     height:100%;
    z-index:10;
   background-color:rgba(255,255,255,0.2);
}