Don't delete editors on RESET.
Don't delete editors on RESET.

This was causing an issue with comment editors since they are still on
the page and the update caused an error to be thrown when
`mapStateToProps` couldn't find the collection for this editor.

[#118520581](https://www.pivotaltracker.com/story/show/118520581)

ello/webapp,ello/webapp,ello/webapp