Provide a summary of the disk space that will be freed

[Phil Bull]

Binary package hint: computer-janitor

A brief summary of how much disk space will be freed when the user clicks "Do selected tasks" would be useful to people who are trying to free space on a full hard disk. It will allow them to see whether using Computer Janitor will have much of an impact on their problem or not.

Some users may also find the information satisfying, as it lets them know that their actions have made some improvement.

A simple label next to the "Do selected tasks" button would probably be sufficient.