[Root Objects] Need a way to specify order (use priorities API)

[jvigliotta]

Is your feature request related to a problem? Please describe.
Yes. Moving MyItems to a plugin from a legacy angular bundle, changed the order that it was added to the roots array in RootRegistry.js.

Describe the solution you'd like
A way to set a specific/general order (priorities).

Describe alternatives you've considered
Installing roots in the order they'd like to be shown. This may not always be possible.

Testing

• verify the Shared Items folder has moved back to the bottom of the list of items in the tree
• you can play around locally as well and give different priorities to different root items

[charlesh88]

Testathon 1-24-22: verified fixed.