Prior to 0.15 book's progress was shown as an integer, however now it shows with 1 decimal of precision. I.e. 21.2% instead of 21%.

I personally preferred this and would love a way to have the old functionality. Understand that this is just a preference though, so feels like a good time to add a setting.

I may have time over the coming days to implement this — but thought I'd gather opinions first. Couldn't help myself. Pr raised: #507