Adjust EggItemShift to account for using the big Egg sprite
Add Marowak to non-transferrable Totems (none of the USUM Totems can be transferred to SWSH)
Strange Souvenir and Room Service would get cut off since they're tall.
Also remove Adventure Guide from resources, and add Discount Coupon to Gen 7 unreleased items.
held item list now allocates less (concat arrays instead of ienumerables)
item list already prunes out of range items, so simplify data source fetch
simplify item list prune (return as list, so we can call RemoveAll instead of Where.ToList)
Increase abstraction for arbitrary slot get/set operations, and fracture
SAV4 behavior for each game type.
Adds: Undo/Redo of party slot changes
Fixes: Fixed Gen5 daycare slot 2 reading, and EXP reading
Fixes: Some slot color glitchiness
Fixed: Box layout editor now hides the flag label if no flags are
present
Fixed: Gen7 box flags are now shown (unknown purpose lol)
Changed: savefile objects are generally smaller (removed a few shared
offset fields)
