Selected and expanded node paths are not transformed when popping a transform

Currently we don't transform selected and expanded node paths back when popping a transform.

I don't think this would be easy to "compute" all the expanded paths in that case, so I think there are 2 possible paths here:

1. remember what the state was before adding the transform.
1. only consider the selected path and expand the tree up to this selected path

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-723)