Several fixes.

[MistakeNot4892]

• Readds parent organ check to internal organ replacement.
• Fixes Augments in limbs do not work reliably #3521
• Fixes polymorph spell kills people and makes it impossble to ghost back into brain  ScavStation/ScavStation#943
• Fixes polyacid recipes being impossible to make due to polyacid melting the grenade.
• Fixes runtimes when using the staff of change.
• Fixes canremove being ignored when dropping or unequipping items.
• Fixes put_in_hands() etc. not respecting DEXTERITY_HOLD_ITEM.
• Changes zone selectors to always show the tail.