[Inputs] Fix wrong active size for mobile devices

[MarvinKlein1508]

Pull Request

📖 Description

This PR fixes the active indicator size on mobile devices for

• FluentTextArea
• FluentTextField
• FluentSearch
• FluentComboBox
• FluentNumberField

Before:

After:

🎫 Issues

Fix #4073

👩‍💻 Reviewer Notes

This was only really visible on touch devices.

📑 Test Plan

✅ Checklist

General

• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.

Component-specific

• I have added a new component
• I have added Unit Tests for my new component
• I have modified an existing component
• I have validated the Unit Tests for an existing component

⏭ Next Steps