[Cooker] [Panoramix] Bugs: Package Install Time Estimate at 100% for 15+ seconds [Minor]

[Garrett Goebel]

When actually copying the packages to disk, the percentage based
progress bar went from 0 to 100% in just 5 minutes for 500+ MB of data
(fast!).

However, it stayed at 100% for 15+ (another 25MB by my guesstimate)
while it finished installing several more packages.

Done should be done... 100% should be completion.