Remove invisible (or barely visible) percentages on UI progress bars

[bertvandepoel]

A while ago, we noticed that on some devices, the i++ UI progress bars had little white dashes at the bottom. After further investigation, it seems all the progress bars have actual labels with a full percentage on them, but the bars are so small that on most devices these labels fully fall of the bars, but on some the very top of the labels show, creating these weird dashes. Since the percentages don't really contribute much, it would be better if these labels were just removed.