- Throttle pushing to history for actions of the same type, starting with 1000ms throttle.
- History has a limit of 64 items, same as workflow editor
- Add clear history button
- Fix an issue where entity transformers would reset the entity state when the entity is fully transparent, resetting the redo stack. This could happen when you undo to the starting state of a layer
I learned that the inline selector syntax recreates the selector function on every render:
```ts
const val = useAppSelector((s) => s.slice.val)
```
Not good! Better is to create a selector outside the function and use it. Doing that for all selectors now, most of the way through now. Feels snappier.
