Fix 2006 bug with refinement within ES::reinit() #2100
Merged
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This was part of a half-baked attempt to support both "refine and
coarsen prior to EquationSystems::reinit for CPU efficiency" and
"refine and coarsen only within EquationSystems::reinit for memory
efficiency" idioms, but the latter support was seriously broken.
The "optimization" being removed here didn't actually optimize any use cases, but did break some.
This is another unrelated bug caught by the unit tests I'm working on for #1938.