A couple issues in the new progress bar #14717

A couple issues were noticed after #14414 was merged. Open this issue to track them.

1. Progress message truncation when MaxWidth is not big enough. See Add minimal progress bar using ANSI rendering #14414 (comment)
2. New progress rendering fails when MaxWidth is too small to have enough space for the [...] part. See Add minimal progress bar using ANSI rendering #14414 (comment)