Uploaded an updated version (1.0-1) in extras-devel

This update includes the requested functionality, i.e. the storage of custom configurations, and a redesign of the GUI.

Changelog:

• Added new option to store and display a custom configuration.
• Several GUI improvements (buttons moved to the left, description includes default values, ...).
• Clean-up of code; better naming of variables.
• Changes in the postinstall script to include the custom settings file.
• Bump version number - app is now feature complete.

As usual, will wait before promoting it also to the testing repo for a couple of days.
In any case,please let me know if you find something wrong/misbehaving or/and more ideas for additions you'd like to see.