Occasional incomplete last square in progress bar

[win98se]

Hi! It's good to see progress bars added in 0.2.6. However when I set a width for them, there is a possibility the last progress square does not show in full.

References:

• Add Component ProgressBar jdan/98.css#96 (comment)
• Merged some fixes from another fork and whole progress bars PlanMan1717/98.css#1