Refs #10431 Extend QReflTableModel

* Add insertRows
* Add deleteRows
Refs #10431 Create default table in helper
Refs #10431 Replace size_t with int

Qt uses `int` instead of `size_t` for row indices. Change our usage to
match Qt's to prepare for using QReflTableModel.
Refs #10431 Pass QReflTableModel to QtReflMainView

The view will now automatically stay in sync with the model, because
we're not going behind the model's back in the presenter.
Merge branch 'feature/10431_refl_presenter_use_model' into develop