This commit includes updates across several modules, including:
- backup_manager.py: Enhancements related to backup deletion and regex for backup naming.
- core/data_processing.py: Adjustments to UI state handling.
- pbp_app_config.py: Addition of new UI messages.
- pyimage_ui/actions.py: Refinements in UI actions.
- pyimage_ui/system_backup_content_frame.py: Integration of new deletion logic.
- pyimage_ui/user_backup_content_frame.py: Minor adjustments.
These changes collectively improve backup management, UI responsiveness, and prepare for new deletion features.