Steps to reproduce:

• Start a normal game
• Cheat to the editor
• Use the cheat to unlock all organelles
• Place a slime jet
• Modify it into a mucocyst
• Hit ok
• Modify it again back to a normal state
• Hit ok
• And now when it is modified again it costs 0 MP to select the mucocyst upgrade again.
• Hit ok
• Now finally modify one last time to switch back to the default state of the organelle which now gives more MP than before and these steps can be repeated for an infinite MP exploit

This bug is probably caused by the GUI somehow mistaking the organelle upgrade state, allowing freely to select an upgrade when it should still cost the normal amount as it was reversed by a later action. Could be a bug in the actions cancelling out system incorrectly calculating things as cancelling out.

If this is fixed, this might also fix: #5518