Keep track of known lists

[mmcknett]

Storage:

• The user profile contains a list (note: not a subcollection) of log names

Update logic:

• When...
  • Logs are retrieved
  • A log is added or modified
• Check that the list for that log is present in the account's list of known logs

Deleting lists:

• Not required for now, but these requirements below would suffice for deleting:
• Make it possible to delete a list, and when a list is deleted it will delete all logs with that list
• Ensure the UX confirms that all logs for the list will be deleted
  • It might be a good idea to have an "archive" where logs go if their list is deleted, instead. Then a separate UX for the archive where logs can be permanently deleted. There would just be an "isArchived" field added to logs in the archive.