**As** an agile user
**I want to** have a sprint Begin of the insertionstart/completeEnd of the insertion Begin of the deletion start/finishEnd of the deletion button in the sprint header
**so that** the feature is easily discoverable and the status of the sprint can be seen.

**Acceptance criteria**

* The behaviour of the start and Begin of the insertioncompleteEnd of the insertion Begin of the deletion finishEnd of the deletion sprint menu items is recreated as buttons in the sprint header