Progress bar

[vicLeva]

Maybe an option to display the progress bar for the download tools that allow it

[yoann-dufresne]

This is of course very useful but at the same time very challenging. I could show the progress bar of the underlying tools. But as soon as the tool uses more the 1 process, the outputs mix together and it is a mess.
A full multi-progressbar manager has to be coded. Meanwhile I should add a jobcount progressbar.