Research if puppet reset is needed when import statement is added

Puppet reset can be an expensive operation on complex projects. Investigate if puppet reset is actually needed when import statements are added. If it turns out that we don't have to reset, see if doing so gives meaningful speedup. (E.g. if it still requires us to reconstruct the entire scene from ground up, it might not speed things up in a meaningful way to avoid process kill/launch overhead, especially as it risks introducing new bugs.)