Option to Customize Destination File for Configuration Saving

[FedericoCalzoni]

Currently, TLP-UI provides a convenient interface for users to customize TLP configurations. However, it saves these configurations in a default location, which might not align with user preferences or system configurations.

I propose adding an option in TLP-UI to allow users to specify the destination file for saving configurations. This would enable users to store their TLP configurations in the directory dedicated to drop-in customizations for TLP (/etc/tlp.d/), providing better integration with TLP's file structure and making it easier for users to manage their configurations.

By offering this flexibility, TLP-UI can better accommodate users with varying preferences and system setups, enhancing its usability and utility.