How to insert JET Progress loading icon to load a list view

Summary

We have a list view that is linked into an action chain and it takes about 3-5 seconds to populate the data into the list view and we want to show a loading icon before the list view is populated

Content

Hello guys!

We've built a mobile app that gets all pending approval purchase orders and for an specific user. The list of POs are populated into a list view through an ArrayDataProvider (ADP) and this ADP gets the data from a REST API from the Cloud ERP. 

It takes about 3 to 5 seconds for the PO List to appear in the screen but in the meantime, the screen shows the message "No items to display" because of the method we had to use to insert the data into the list view.