Which filter is used by which board

Problem Definition

Boards not accessible show information about boards from Inactive Users using private filters.
The administrators do not have permission to check this information to be sure if they can safely delete this board.
It creates a lot of noise on the View all boards page and it can be confusing for the users.

Another improvement that could be added to the view all boards page is the addition of filters for the boards.
The addition of filters for owner, location, and project would be most welcomed.

Suggested Solution

Help administrators understand which filter is used for which board, which would make the decision of whether to remove a board easier.
Implement filters to the board page that would help admins search easily for filters.