Table Block: Toggling Header/Footer rows results in lost data

[shaunandrews]

When working with a table block, I found that toggling the Header/Footer sections can lead to a loss of input data. To reproduce, try this:

1. Add a table block to your document.
2. Turn on the Header section from the block sidebar.
3. Add text to any Header section cell.
4. Turn off the Header section from the block sidebar.
5. Turn on the Header section from the block sidebar.

After toggling the Header, I'd expect the text added to the Header cell to be retained. Instead, the text is removed and all cells are no empty.

[talldan]

After toggling the Header, I'd expect the text added to the Header cell to be retained. Instead, the text is removed and all cells are no empty.

Thanks for creating the issue. For some background, this was discussed pretty extensively in the initial PR and the decision was that is wasn't needed since undo/redo work for restoring the data:
#15409 (comment)

Given that, I'm going to add the Needs decision label. Perhaps it'd be something you could raise as a point in one of the design meetings, @shaunandrews?

[ntsekouras]

Hey @talldan and @shaunandrews! Had you discussed this back then in a design meeting or somewhere else?

Since there is an alternative with undo and there were no other references about this since then, should we close this issue and the respective PR?

[shaunandrews]

I'd still consider this an issue, but I might be alone. I'll close it myself as it doesn't seem like there's much to do here.