### Scope - Refactor time shifting mechanism (see [doc](https://grafanalabs.enterprise.slack.com/files/U01EBQXL207/F095LAZADU7/time_range_comparison_-_undoing_the_pre-shifting_mechanism)) - Add option for custom values - UX polishing: Should time comparison be enabled via toggle in edit mode? If so, do we want to persist that setting?
