bugfix: history bugs

[inevermore]

No description provided.

[soccerloway]

@inevermore Thanks for your PR.
When I apply your changes, the top column tool missed. And 'merge cells' did not work as usual.

[inevermore]

@soccerloway I didn't check all, just try to fix the history bug. Hope this pr can help you:smile:

[soccerloway]

@inevermore Thank you, your changes must be useful~:)
It make insert/delete undo works well.

[kagol]

Thanks for your fixing, but will this change have side effects?

[soccerloway]

@kagol This is not a rigorous fixing, but inspiring.
Don't use it for now.

[kagol]

This will cause some side effect when table has rowspan/colspan(initial/paste)

[inevermore]

@kagol Yes, this is not a qualified pr. I just focus on history bug. Hope this can inspire you.

[inevermore]

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[kagol]

@inevermore Thank you anyway~

[sirgru]

Any progress on this issue?

[soccerloway]

Actually no. I think it will take much time to fix the issue, but I'm busy in the end of the year.
I'm sorry for the delay.