Add log excerpt sheet status to the URL (which one is open)

add dialog status to the url (which one is opened) so people will copy and paste the link with the dialog opened

Start at the log excerpt sheet and dialog URL-state handling in the dashboard; trace how the currently opened dialog is represented. Done means a copied link identifies the open dialog and reopening that link restores it, including the case where no dialog is open.

Written by the indexing model from the issue text.