The focus metrics selected for an exercise group, ordered by their
userAppDisplay rank and capped at four (the rep-feedback grid holds at most
four). userAppDisplays spans every exercise group, so entries are filtered by
both the focus-metric category and the group. Empty until the stores resolve,
or when the group has no focus metric selected.
The focus metrics selected for an exercise group, ordered by their
userAppDisplayrank and capped at four (the rep-feedback grid holds at most four).userAppDisplaysspans every exercise group, so entries are filtered by both the focus-metric category and the group. Empty until the stores resolve, or when the group has no focus metric selected.