Fixed case-sensitive sorting for KTable

[BabyElias]

Description

This PR fixes the issue caused by case-sensitive sorting for KTable where uppercase characters were sorted before lowercase characters. toLocaleLowerCase() method has been used to ensure internationalisation concerns are addressed while standardising strings to lower case for comparison.

Issue addressed

Addresses #852

Before/after screenshots

Before -

After -

Changelog

• Description: Makes KTable sorting case-insensitive and internationalized
• Products impact: bugfix
• Addresses: [KTable]: Improve built-in sorting to handle case-insensitive string sorting #852
• Components: KTable
• Breaking: No
• Impacts a11y: No
• Guidance: NA

Does this introduce any tech-debt items?

No

Testing checklist

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical and brittle code paths are covered by unit tests
• The change is described in the changelog section above

Reviewer guidance

• Is the code clean and well-commented?
• Are there tests for this change?
• Are all UI components LTR and RTL compliant (if applicable)?
• Add other things to check for here

Comments

[MisRob]

Thank you for keeping taking care of the table, @BabyElias :) I will invite my colleague @AllanOXDi for review. One suggestion from me would be to add a unit test to cover this, if you'd like to do so meanwhile.

[MisRob]

@AllanOXDi for reference, this issue #852 was open by @BabyElias after we agreed together it's expected behavior.

[BabyElias]

I have updated the test cases to cover strings having both lower and uppercase characters.

[MisRob]

Neat

[MisRob]

This looks good to me too. @AllanOXDi feel free to merge after you've seen the latest changes if you think all is ready :) Thanks both!

[MisRob]

I made a small tweak to the changelog "Description" to be a bit more specific.

[AllanOXDi]

Looks good to me too! Thanks @BabyElias