Create unit tests for Blazor view models

[ekolis]

What needs to be cleaned up?

View models are advantageous because they can be unit tested. Let's do that.

How will this benefit us?

Avoid regression bugs

What potential drawbacks are there to making this change?

Testing is a time sink!

-- waiting on #309

[ekolis]

Actually let's not do this, let's get rid of the view models #348

[ekolis]

Reopening, looks like we're keeping the view models for now, see #348