Resource doesn't set total when data passed

[tomdye]

Bug

Problem
When setting data via a resource factory via the data middleware, the data passed it loaded into the resource but the total is not currently set.
This means that even though the data has been side-loaded, when you call getTotal, undefined will be returned.
This was working for data sets beneath the page size because the resource was making a call to the data templates read function which then set the data.

Example

This issue is highlighted on this sandbox: https://codesandbox.io/s/clever-tesla-erjfp

Solution

We should set the total when side-loading data via the resources set function.