fix(useSortBy): fix the bug that causes flatRows to be incorrect when sorting and using subRows

[aaryn101]

This should also fix #2303, though obviously I was noticing different symptoms.

[dbertella]

What's the status of this pr? I'm having this exact issue, I was going to report, can we move forward or is there any blocker?

[dbertella]

If someone else lend here, as a work around I'm sorting the data before pass them as parameter to useTable hook, but yeah it's not great. Anything we can help on this one? (of course this will work as initial sorting, not sure what happens if you update sorting manually)

[aaryn101]

@tannerlinsley Would you please take a look at this PR?

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[tannerlinsley]

🎉 This PR is included in version 7.3.4 🎉

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[Chase-Dickerson]

@aaryn101, can you take another look at #2303? This PR did not address that issue.