Big inventory by default and other tweaks

Expansion Disc has been removed from the Overworld (later on it may return to expand the inventory to an even bigger one)

Instead, inventory is expanded by default from the start of the game. Your existing inventory should also become expanded if you already started the game. If it doesn't, please let me know!

Digging for items while you have full Memory should transfer dug up items into the Bank now

A few other tiny fixes