Workboard columns should support group separators. This will allow us to improve or implement several things:
- A "Group by assignee" view on workboards, where tasks are grouped by assignee and you can drag to reassign.
- Priority headers on "Sort by Priority" workboards, so the effect of dragging to a column on the task's priority is communicated more clearly, and tasks can be changed to, for example, "High" priority even if there are no other "High" priority tasks in the column.
- Group by Project, see which other projects and milestones a task belongs to.
In both cases, the headers should probably also sum points/cards in the group.