This sheet governs aspects of how actions are displayed in the "Actions & Traits" menu.
- `UpgradeAction` (prev `Unknown0`): The upgraded version of a given action.
- `BaseAction` (prev `Unknown1`): The base action to display.
- `ComboTreeLayout` (prev `Unknown2`): Defines how an action is arranged within a combo diagram.
- `GroupedCell` (prev `Unknown4`): Currently only used for MNK actions; arranges a set of actions together within a rectangular cell, instead of as a tree.
