Dashboard paging broken after deleting courses

[taylortom]

Expected Behaviour

On deleting a course, we need to do a fresh fetch to make sure the full amount of courses are shown.

Actual Behaviour

It's possible to break the paging by deleting enough courses to hide the scrollbar.

Steps to Reproduce

1. Make sure you have enough courses to cause paging
2. Resize browser to fit a small number of courses (I had two rows of three)
3. Delete courses until you're down to a single row
4. Note no more courses are fetched, page must be refreshed to fix

[lc-thomasberger]

I am not sure if we should stick to the infinite scrolling approach.
Especially for Assets I think it is more usable to have pagination links. As this gives you a better overview about the amount of pages/ items are available. It is also much easier to navigate through a collection. A good example is github's issue page.

I think we should move to pagination links for Assets and Dashboard.

[taylortom]

Also see: #1824