When selecting a mip in a 3D texture, update slice list. Refs #359
When selecting a mip in a 3D texture, update slice list. Refs #359

* The sliceFace passed in via the replay interface is still in 0-n range
  with n being the top level mip dimension. We just change the drop-down
  so that it only lists the number of slices at that mip, and scales up
  accordingly.

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