Fixes #230: Now the Cursor is not in charge of changing its texture based on GUI blocking. It's the GUI's responsibility to determine what happens to the cursor when it's locked or unlocked.
upd Clean E.clicked and I.clicked once the interaction is handled.
fix Sierra GUI inventory item use was not behaving as expected.
fix Rollback call to E.command_fallback() as the default call for the _on_click() function in inventory_item_template.gd.
fix Hiding the InventoryBar by default when the GUI is blocked, was making the animation when adding new items not to shown because the node was invisible.
Fixes #230: Now the Cursor is not in charge of changing its texture based on GUI blocking. It's the GUI's responsibility to determine what happens to the cursor when it's locked or unlocked.