Contents Tab Expand All Button

Description: Include an “Expand All” button at the top of the Contents tab that expands all the + signs for the collection.

NOTE: If we cannot fix speeding up the load times, then we should NOT implement this.

Documentation (More Info): https://docs.google.com/document/d/1Tps9nmNmRihV8v4DZW6w7Qq-3dHTNLQaEUhjskt3WP4/edit