Broaden Manage Library -> Code Tab scope

Overview

From #3540577: Displaying and creating folders

A proposal by @jessebaker that we decided to implement:

In Manage library, let's display both internal and exposed code components under the Code tab. The backend already supports the organization into folders for JavaScriptComponent entities, which will be separate from organizing the Component entities, which will take effect under the Components tab — where exposed code components are represented by Component entities.

Proposed resolution

• Update xb_test_folders so some exposed components that belong to folders in Components also belong to folders in Code
• Update the logic responsible for displaying components/folders in the Code tab so exposed components are in the list of items to display.
• Perhaps see if the design contributors think there should be any visual distinction depending on the if the component is exposed/unexposed

User interface changes