Display a message when a board has no columns with a mapped status

Problem Definition

At the moment, when a board has no columns with a mapped status, no message is shown in the UI and the backlog is simply showing as a blank page. As now, we had to check the network request and see that the JIRA API responded with error "This board has no columns with a mapped status”.

Suggested Solution

Since there is a API response with error "This board has no columns with a mapped status”, this error should be displayed in the UI instead.

Why this is important

This makes it easier for users to understand the root cause of the problem.