Role admin "Change Category" dialog should mask while saving

[amcclain]

It does not, you see a mask on the panel underneath - not optimal, especially if a category change is not instantaneous. We want the UI feedback here to be quite reliable for something like admin role adjustments.

[amcclain]

While we have this open, would be great to autoFocus the select

[amcclain]

Re-opening this ticket - we mask during save but dialog then still stays open while parent refreshes, but now without a mask.

Dialog should save and close then parent should refresh - once save is done then dialog is done and should be dismissed. See pattern for primary editing, which follows this pattern. That will get the masking 100% right and also ensure that any error refreshing after a successful save isn't confusing - the save did actually happen.