Replace "Entries_Failure" error with "0 entries" message

**Is your feature request related to a problem? Please describe.**
In coming to grips with Netlify, I haven't added any entries to any collections yet. When I open the CMS, I'm met with a red API_Error alert, and the console shows an Entries_Failure error from the Promise reject.

**Describe the solution you'd like**
As collections may be left empty intentionally, a better solution would be a message either in line with the collection top heading or under it letting the user know it's empty. This is just a quality-of-life change, but something less jarring for new users.

**Describe alternatives you've considered**
I haven't attempted any alternatives yet, as this seems internal.

**Additional context**

_The console error in question_