Issue #3560377: Content outline: Allow sections to be expanded and shortened - improve dev mode

Sally Youngrequested to merge
issue/conductor-3560377:3560377-dev-mode-2 into 2.x

Issue #3560377: Content outline: Allow sections to be expanded and shortened - some items missed during merge conflict resolution

Testing instructions

  • [ ] Run npm run dev -w app and verify that the app looks more like it should when run in Canvas

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