Blocks not selectable on this dataset

I have a dataset (ztest.g.8.*) that has all blocks turned on, all the time. Here is how to replicate:

• 5.8.0, OS X, builtin server.
• Open ztest.g.8. Apply. This is what it should look like.
• Turn off block 200 in the Exodus reader. (This is the green cylinder). Apply.

The block doesn't turn off. This is a bug.

• Note that if you open ztest.g, the blocks properly turn on and off.

I will get the dataset to Utkarsh and Cory.

@utkarsh.ayachit Exodus reader bug.