feat: enhance ShowIconSettings component with dialog and file upload functionality

- Updated the ShowIconSettings component to include a dialog for icon selection and upload.
- Added functionality to handle file uploads, including validation for file types and sizes.
- Implemented icon removal feature within the dialog.
- Refactored icon selection logic to improve user experience and maintainability.
- Adjusted the application page to integrate the updated ShowIconSettings component.

Author: Siumauricio