Added "Selection Helper"
  ItemStacks held by the player now resize to fit the slot and highlight
  multiple SlotMSI slots if it can fit there.
  They also turn into the MSI Image while over SlotMSI slots

Fixed SlotMSI rendering only the center slot on all of the slots
  Note to self: Next time don't test with images where you wouldn't be
  able to tell if one part of it was swapped out with another part of it