Fix editor's width miscalculations

[budnix]

Context

The PR fixes an editor's textarea element miscalculations (jumping width) while typing that can be visible on low-end computers. To create a fix, the autoResize module had to be fixed. I simplified its code to listen only for one input event (it turned out to be enough), and I removed all workarounds from the text editor that unnecessarily calls the resize method. In the end, I decided to move the module to the general utils for better code owner feeling.

Before:

After:

How has this been tested?

I tested the changes locally with and without IME, and I covered the fix with updated tests.

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Related issue(s):

1. fixes https://github.com/handsontable/dev-handsontable/issues/1547

Affected project(s):

• handsontable

Checklist:

• I have reviewed the guidelines about Contributing to Handsontable and I confirm that my code follows the code style of this project.
• I have signed the Contributor License Agreement