Undo: Add support for fixing columns

[AMBudnik]

Description

We are not able to undo/redo fixing columns - in the result when we remove fixed columns and bring them back they're not fixed anymore.

Steps to reproduce

1. Remove columns A-C that are fixed
2. Undo

Result
Columns are back but they're not fixed.

Demo

https://jsfiddle.net/sm7d8x4n/1/

Your environment

• Handsontable version: 7.4.2
• Browser Name and version: n/a
• Operating System: n/a

[aninde]

This issue will be fixed by v8 with changes on selection after restoring removed columns.
https://jsfiddle.net/aninde/whezjkpm/1/

[AMBudnik]

For anyone following this topic: We just launch Handsontable v 8.0.0 where this issue is fixed.

CDN https://cdn.jsdelivr.net/gh/handsontable/handsontable@latest/dist/handsontable.full.css
https://cdn.jsdelivr.net/gh/handsontable/handsontable@latest/dist/handsontable.full.js
NPM npm i handsontable
Release Notes https://github.com/handsontable/handsontable/releases