int size_legible_len = strlen (size_legible);
/* The progress bar should look like this:
- xx% [=======> ] nn.nnn rrK/s ETA 00:00
+ xx% [=======> ] nn,nnn 12.34K/s ETA 00:00
Calculate the geometry. The idea is to assign as much room as
possible to the progress bar. The other idea is to never let