Sort timeseries on tabular view.

Having timeseries jump around every time you hit Execute is annoying.
Some ordering is required, so sort the timeseries. localCompare is
browser-dependant, but that's sufficient for this use case.

More powerful sorting/grouping options would be nice, this should cover most
use cases as a sane ordering like this is sufficient for eyeballing data.
> no functions give any guarantees about the sorting of the output, except special ones like sort and sort_desc

That doesn't solve the problem, there would need to be some ordering on the output of all expressions. Otherwise, the presentation layer would need to look at the expression, see if sort/sort_desc was used and if not apply an ordering.