[Feature Request] Show more session details of push/pulls

[ikwyl6]

Would be nice to show, before the 'Proceed with changes', some overall details of the changes before committing:

1. Overall how many files are + and -
2. Number of files to be changed, shown by 1st level dirs under the 'root' dir
3. After user commits to proceeding, add push/pull kB or MB rate and total file size on the same line as:

112 / 1614 [======>----------------------------------------------------------------------------------------] 6.94 % 19h43m9s