New Docs: FIX search shortcuts after route changed.

[Siemienik]

Context

In the listener, I changed the logic of which source elements are valid. It still ignores textareas and other kinds of inputs.

How has this been tested?

Tried to reproduce as described in #8374

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature or improvement (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Additional language file or change to the existing one (translations)

Related issue(s):

1. New docs: Cannot focus search bar input with keyboard shortcuts #8374

Affected project(s):

• handsontable
• @handsontable/angular
• @handsontable/react
• @handsontable/vue

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
• My change requires a change to the documentation.

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[budnix]

It's much better. However, when the theme switcher or the code-block tab is active:

the search hotkeys still not working. Can you improve that?

[budnix]

Works like a charm 💪