Bingo-esque Lab improvements

A few ideas for improving lab.

* Add improved Offering to Tribute final chest pool (Tribute can't drop offerings at all, currently)
* Higher chance (i.e. 50% instead of current ~10%) to drop improved offerings from final lab chests (or make it guaranteed)
* Fix the lever hitbox so you can flip them from their narrow ends. So annoying.
* Kirac offer Improved Labyrinth Trial missions
* Allow Control-C to copy gem information on divine font
* Add gold jackpots to lab chests (lab is very gold-scarce, currently).
* Lower gold cost for trading high level/quality gems in the merchant shop

You had me at Bingo.

Bumping this to add:

For the love of God, please give us back a way to properly farm Offerings. Make a corrupt implicit on maps that guarantees an elevated lab trial or something.

Having to spam 20 maps just to see 1 elevated trial is asinine.

For those that were unaware, we could previously buy corrupted maps with "map crafting options have no cost" and then use the crafting mod "Improved Trial of Ascendancy" from Shaping the Skies to force an improved trial indefinitely.

This kept the price of offerings from skyrocketing, which has been happening all league in Mirage. Gift to the Goddess is now sitting at about 1600 chaos.