CORE-4193:
Integrated/ported the hierarchical list selector into the new App
Integration window. This included updates to how the normal selection
lists work as well. 2-way updates between the properties panel and
center panel were updated/implemented.
Refactored the way value changes are communicated throughout the editor
when in edit mode (doesn't matter in app launch mode)
CORE-4193: Implemented CSS hover effect to show that user can select
Merge branch 'master' into STABLE