Closing an issue in a Simplified Workflow Kanban leaves Resolution as 'Unresolved'

On a Kanban board, if an issue is moved to the standard <DONE> column, it will be marked as either Closed or Resolved. However, when viewing the issue the Resolution field still shows "Unresolved".
This can be confusing to users.

Steps to reproduce.
*Create a new project with the default workflow
*Make a new Kanban board
*Make an issue
*Move the issue from To Do or Progress to Done.
*Check the issue details.

As a workaround, please see https://confluence.atlassian.com/display/GHKB/Unable+to+set+issues+to+Resolved+using+Greenhopper+Simplified+Workflow