Modifying the columns number input kills the content

[draganescu]

Describe the bug
When we alter the number of columns using the input instead of the slider the content is not saved.

To reproduce
Steps to reproduce the behavior:

1. In a post or page
2. Add a column block
3. Write some text in both blocks
4. Select the columns block
5. Modify the number of columns in the inspector by changing the number in the input, instead of the slider, e.g. instead of 2, delete 2 and write 3
6. Content is gone.

Expected behavior
To behave like the slider:

• If I am adding columns the content remains
• If I am removing the content is deleted RTL
• If I add the same number the content is saved

Screenshots

[youknowriad]

This is related to #9009 while not exactly the same thing, I think they should have a unique solution. Would you mind adding details to that issue.

[draganescu]

@youknowriad I'll add there, but that problem (#9009) is about adding rows to columns, while this looks like a bug in handling that number input, a much smaller issue I'd say, right?

[youknowriad]

yes, smaller one but if the fix for the other issue is to avoid the "input" and use buttons to add/remove columns, this will be fixed automatically. I don't mind reopening this issue but it feels like the solution could fix both

[draganescu]

good point on removing the input!