0.17.0.1 - Bugfixes after last major update

Fix regression where insight discounts were causing insight cost to go above 1 instead of below 1.
Dramatically reduce the power of 'prestige timer' prestige ability, which was allowing prestiges to happen way quicker than intended.
Scale back Job Point Scanner power a bit too, it was way too powerful once you had a bunch of them, and increase its job point cost scaling.
Rename 'Metal Factory Disc' -> 'Alloy Factory Disc' for clarity.
Improve some item descriptions.
Fix bug with prestige tab becoming invisible again when it shouldn't.