Some additional things from today's devstream:

• Procgen: added regular Coal to the Limestone Caves biome (burns hotter than charcoal)
  
• added reactions for Chromite (including thermite reaction of Ferrochrome with Aluminum to separate out Chromium)
• added some chemical routes to get Nickel from Pentlandite more easily
• added ability to press 1-9 keys when hovering a material inventory slot to swap it into the corresponding inventory bar slot
• BUG FIX: fixed an issue where Sand could get removed from Inventory when sorting
• BUG FIX (minor): fixed some label appearance errors when cursor is over the UI