[8.0.0.-beta2-rev1] Merged area is not highlighted if a part of it is hidden

[AMBudnik]

Description

Merged area is not highlighted if a part of it is hidden.

Steps to reproduce

1. Go to https://jsfiddle.net/h8t7wmdr/
2. Select columns A-C

Result
The merged area is not highlighted

Expected result

Demo

https://jsfiddle.net/h8t7wmdr/ 8.0.0.-beta2-rev3 (broken)
https://jsfiddle.net/235snLvr/ 8.0.0.-beta2-rev1 (broken)
https://jsfiddle.net/8uho2f3L/ 8.0.0-beta1 (works well)
https://jsfiddle.net/8uho2f3L/1/ 7.4.2 (works well)

Your environment

• Handsontable version: 8.0.0.-beta2-rev1
• Browser Name and version: Chrome 80
• Operating System: macOS Catalina

[AMBudnik]

Works the same if we hide right part (without visible data) https://jsfiddle.net/7a3cq2mt/

[AMBudnik]

Case 2

Context menu for merged cell sows different option in context menu
https://jsfiddle.net/AMBudnik/ktqogzwb/ 8.0.0.-beta2-rev7 - 8.0.0.-beta2-rev10
https://jsfiddle.net/AMBudnik/dbcqm7vk/1/ 7.4.2 - 8.0.0-beta2-rev6

Steps

1. Go to https://jsfiddle.net/AMBudnik/ktqogzwb/
2. Open context menu for A header

Result
In versions from 8.0.0.-beta2-rev7 to 8.0.0.-beta2-rev10 we get Merge cells option

Steps

1. Go to https://jsfiddle.net/AMBudnik/dbcqm7vk/1/
2. Open context menu for A header

Result
In version from 7.4.2 to 8.0.0.-beta2-rev6 we get Unmerge cells

[aninde]

A list of known bugs that can be related:

• Merged Cells + selection causes improper merge cell highlight. Merged Cells + selection causes improper merge cell highlight. #4859
• Hiding rows while there is a merged area involved causes data shifting and unexpected merged area coordinates Hiding rows while there is a merged area involved causes data shifting and unexpected merged area coordinates #6376

[AMBudnik]

Main case solved with 8.0.0-beta2-rev13 https://jsfiddle.net/AMBudnik/8fjdnq0p/
The case 2 solved with 8.0.0-beta2-rev13https://jsfiddle.net/AMBudnik/js1dwt7y/

Well done!