Problem Definition

Currently, it is only possible to move an issue from the backlog to the board (and vice-versa) dragging-and-dropping the issue on the backlog view.

Suggested Solution

Allow users to move an issue from the backlog to the board (and vice-versa) from the issue view, under the button "More" (...)
Also, allows selecting whether or not to move an issue from the backlog to the board by changing the issue status.

Workaround