.query-scheme-window{
    background:red;
} 
.query-scheme-window .k-window-content{
    display: -ms-flexbox;
    display: flex;
    -ms-flex-direction: column;
    flex-direction: column;
}
.query-scheme-wcontent{
    -webkit-box-flex: 1;
    -ms-flex: 1 1 auto;
    flex: 1 1 auto;
}