- Gantt Chart directive
  - item vs gantt task - only one task per item (eg. sprints)
  - item vs multiple gantt tasks - task timer timestamps (eg. task timing view)
  - wire up the gantt tasks to item changes
  - freeze the ability to change gantt items for now
  - date range offset fix
    - the offset fix is not currently working on init
	- but works via the scale dropdown button
  - To Do: gantt chart for specific items