forEachChangeReversed
Common
```kotlin
@ExperimentalFoundationApi
inline fun ChangeList.forEachChangeReversed(
block: (range: TextRange, originalRange: TextRange) -> Unit
)
```
Iterates over all the changes in this [ChangeList] in reverse order.
Changes are iterated by index, so `block` should not perform any new changes before the current
one or changes may be skipped. `block` may make non-overlapping changes after the current one
safely, such changes will not be visited.