Re: [csswg-drafts] [css-flexbox] Allow fractions for order

@Nadya678 yes, but need rebalancing after an update (simpler to use order: 2, order: 4, order: 6, then allow an item to move, and then rebalance the list)


I also wonder if `order: 1 -1` is before `order: 1`

With postgresql the ordering of `INT[]` is as follows:

```
1
1 -2
1 -2 -2
1 -2 2
1 1
1 1 -9 8
1 1 1
1 1 1 -2
1 2
2
2 -1
2 1
2 2
3
```


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