Explain the problem as you see it
When viewing a list by groups, the groups are not collapsable and cannot be dragged to reorder.
Using the example below, I cannot collapse the "Not defined" group and I cannot drag to reorder it above the "Improve Wrists" group
Why is this a problem for you?
Lack of collapsibility effects visual focus / attention and consumes screen space
Lack of draggability can be workaround-ed by Group dropdown deselect-reselect but this workflow is an annoyance / time-suck
Suggest a solution
Collapsable group headers
Draggable group headers
As if group headers were nodes (everything's a node right? 😉)