* fix: several library unit page UX bugs (#1868)
* fix: rename "Organize" tab to "Manage"
* fix: duplicate key warnings
* fix: uniform messages while adding to collection
* fix: do not allow units be added to a unit
(cherry picked from commit 0fdc460c5b)
* perf: use Library search results to populate container card preview (#1820)
* fix: use Library search results to populate container card preview
* feat: show published children when showing only published Unit content
* fix: nits
(cherry picked from commit 24e469542d)
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Co-authored-by: Rômulo Penido <romulo.penido@gmail.com>