Higher Ranked Sprint Should Have Higher Ranked Issues

Problem Definition

When we move an issue from backlog to an empty sprint, the RANK is not updated.
Steps to reproduce:

1. Create a new board with 2 sprints
2. Create at least 3 issues to backlog
3. Move Issue 1 to Sprint 2
4. Move Issue 2 to Sprint 1
5. Move Issue 3 to Sprint 2 after Issue 1
6. On Search for issues page, you will notice the order of the issues is
   • Issue 1 -> Issue 3 -> Issue 2
     
     

This is not sensible where the higher ranked sprint has a lower ranked issues.

Note

Noticed that this behaviour is caused by the act of moving an issue into an empty sprint is not changing the rank. When there's an issue in the sprint, the rank will then changed accordingly so the issues in the same sprint would have a similar rank.
See Unable to embed resource: RANK.webm of type video/webm

Suggested Resolution

RANK should adjust according to the sprint even the sprint is empty.