[Handsontable] Retesting all reported bugs with v8

[aninde]

Description

Due to the huge amount of code changes related to version 8, we should check and update all GitHub bug reports in https://github.com/handsontable/handsontable/issues?q=is%3Aopen+is%3Aissue+label%3A%22Type%3A+Bug%22

Chores

With each issue we should:

• [ ] make a demo if it's not there
• [ ] update the demo to version 8
• [ ] compare with v7, test if anything changed
• [ ] check if we have a test for it
• [ ] close issue if the bug is fixed by v8
• [ ] make a summary of the work performed on this issue

List of bugs for retesting

After the release of v8

https://github.com/handsontable/handsontable/pull/6610 https://github.com/handsontable/handsontable/issues/6383 https://github.com/handsontable/handsontable/issues/6664 https://github.com/handsontable/handsontable/issues/4480 https://github.com/handsontable/handsontable/issues/7114 https://github.com/handsontable/handsontable/issues/6177 https://github.com/handsontable/handsontable/issues?q=is%3Aopen+is%3Aissue+label%3A%22Type%3A+Bug%22

Fixed by v8

1. • [ ] https://github.com/handsontable/handsontable/issues/4767
2. • [x] https://github.com/handsontable/handsontable/issues/7114
3. • [x] https://github.com/handsontable/handsontable/issues/6637

Still broken

1. • [x] https://github.com/handsontable/handsontable/issues/6787

[AMBudnik]

@aninde I've just closed and updated all the issues from the RN based on this document https://github.com/handsontable/handsontable/releases/tag/8.0.0. There are some issues that I would need to confirm or retest - those are listed here https://github.com/handsontable/quality/issues/62

[aninde]

Closed #58 as done by support.