Missing project labels in group issue board issue cards

In the columns (issue card), project labels are missing. For example: https://gitlab.com/groups/gitlab-org/boards/364268?milestone_title=10.1&scope=all&utf8=✓&state=opened&label_name[]=Discussion

For more context on what should be shown and not shown, see: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2467#note_38452577

changed milestone to %10.0

added Discussion ~579550 regression labels

cc @felipe_artur @psimyn

changed the description

added labels label

assigned to @psimyn

mentioned in merge request !2957 (merged)

closed via merge request !2957 (merged)

mentioned in commit a52cd764

Thanks @iamphill + @psimyn

mentioned in commit b0d96291