Build 54: new quest type randomization

Previously, on every new level load the quest system - the "QuestLord", as the source code reads - would shuffle the list of possible quests and pick one. This meant that sometimes, you'd get the same kind of quest three levels in a row. Now, it uses a pool that persists across levels, so it will always go through each quest type once before selecting the same one again. This should create more variation as you play across multiple levels.

Other more minor stuff: quest screen wording tweaks, better spacing out of journal page spawns, a menu option to disable the detector gem, a fix for being frozen if you exit a level while talking.