When updating the progress bar while loading the package list, get the length of the number of packages we need to load minus 1 or maybe 2, and use that many zeroes after a 1 so it scales better if the total number is larger than what I already accounted for so it doesn't update the UI as often.

[DrewNaylor]

May help a bit. Perhaps this should be applied to the extraction window, too?

[DrewNaylor]

Probably would have to ensure we sync the threads or something when updating the progress bar so there's no race condition. Delegates would be necessary to prevent cross-thread issues.