Update lists.less
Update lists.less

in ``position: absolute`` mode, 

```css
.sortable-handler {
    height: ~"-webkit-calc(100% - 1px)";
    height: ~"calc(100% - 1px)";
}
```

is semantically equivalent to

```css
.sortable-handler {
    top: 0;
    bottom: 1px;
}
```

and can produce better compatibility
Janusorz/Framework7,Janusorz/Framework7,Janusorz/Framework7