"disk space to be recovered" should display the space for different drives.

[mr-brunes]

Describe the bug
After running Preview, the output only mentions "disk space to be recovered" as a total.

To Reproduce
Steps to reproduce the behavior:

1. Click Preview

The issue happens every time.

Expected behavior
It would be far more useful for BB to display space to be recovered on a per-drive basis as well as a total amount.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):
Windows 10
Bleachbit 4.6.2

Additional context
The issue is that it is very useful to know where apps/OS are writing superfluous files.