When a changeset is made, often the changes specifically relate to a given URL and with a specific panel, section, and control being expanded. It would be ideal if whenever a changeset is saved, that we pass along the current previewUrl and any expanded panel/section/control so that these params can then be used in the links generated for “Edit in Customizer” and “Preview SnapshotChangeset” as the url and autofocus params respectively.

This closely relates to Customizer Browser History, and this would greatly help with returning to work on a changeset after saving.