Passing nestedHeaders as a single empty array stops the table from painting

[AMBudnik]

Description

Passing nestedHeaders as a single empty array stops the table from painting.

Steps to reproduce

1. Go to https://jsfiddle.net/4vbtzefw/
2. Open the console to see
   

This way, when we pass correct values by updateSettings we still do not get the table working https://jsfiddle.net/4vbtzefw/1/

Expected result - solved by 8.0.0-beta2-rev16
Nested headers are ignored and table paints without them https://jsfiddle.net/r3b0tz4d/
It also allows me to repaint the table by updateSettings which was impossible in v 7.4.2 https://jsfiddle.net/jk70Lcy8/

Demo

https://jsfiddle.net/4vbtzefw/ 7.4.2 (broken)
https://jsfiddle.net/jk70Lcy8/ 8.0.0-beta2-rev16 (works well)

Your environment

• Handsontable version: 7.4.2
• Browser Name and version: Chrome 83
• Operating System: macOS Catalina

[AMBudnik]

The issue is not replicable in v 8.0.0 https://jsfiddle.net/zjvo5wyq/