fix: display sorting indicator in DataGrid headers

[stepwise-alan]

Pull request type

Please check the type of change your PR introduces:

• Update
• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes

What is the current behavior?

Currently, when using a DataGrid and sorting it by clicking on the header, the default behavior is to display a sorting indicator (▲|▼). However, this indicator is missing due to the applied header style in the project.

Issue Number: #1160

What is the new behavior?

• The default sorting indicator (▲|▼) is now displayed correctly in DataGrid headers after applying a style.
• The issue where the sorting indicator was missing has been fixed.

Other information

Before the change:

• No sorting indicator was displayed in DataGrid headers when sorting columns.

After the change:

• The sorting indicator is correctly displayed in DataGrid headers when sorting columns, improving user experience.

[stepwise-alan]

Closing this pull request as the sorting indicator fix is now part of a larger PR that resolves multiple issues related to DataGrid. Please check #1192 for the latest updates and consolidated changes. Thank you for your understanding!