Adaptive mesh refinement workflow

[baagaard-usgs]

Description

1. Solve problem.
2. Create refined mesh.
3. Transfer solution from original mesh to refined mesh.
4. Reset problem.
5. Replace original mesh with refined mesh.
6. Solve problem again.

[baagaard-usgs]

We should add a derived field for the gradient in the strain energy density for use as an indicator for refinement.