Add multiple assignees to issue board
What does this MR do?
Adds multiple assignees to issue board. Backend is incomplete in this MR. It is only stubbed for the rendering.
Are there points in the code the reviewer needs to double check?
Shouldn't be.
Why was this MR needed?
Screenshots (if relevant)
| 1 Assignee | 2 Assignees | 3 Assignees |
|---|---|---|
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| +1 | +10 | 99+ |
|---|---|---|
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