[Improvement] Have Enter select remaining elements in selector with filter=True

[FlorianJacta]

📌 Description

In a natural workflow using a selector component with filter=True, users typically type to filter options and then press Enter to select the filtered (remaining) elements. However, this behavior is currently not working. Pressing Enter does not trigger selection of the visible or remaining filtered options.

This disrupts the expected user experience, especially in multi-select scenarios where users want to quickly filter and confirm selections via keyboard.

Expected behavior:

When filter=True, pressing Enter should select the currently filtered/remaining options in the selector.

📜 Code of Conduct

• I have checked the existing issues to avoid duplicates.
• I am willing to work on this issue (optional)

✅ Acceptance Criteria

• The refactored code maintains existing functionality without breaking changes.
• Any new code is covered by unit tests.
• Code coverage remains at least 90%.
• Performance improvements are documented, if applicable.