Fix creating zvol with volblocksize
While trying to change the zvol size in legacy UI it appears to take affect but does not.
If I try to edit the zvol size it applies the changes but the size of the volume does not change.
Original zvol size was 20GB Editing to change to 25GB. It appears to have normal behavior when making the changes but the size does not change.
tank/t1 74072379968 22148808704 0 553536 22148255168 0
tank/t2 74072850176 22148808704 0 83328 22148725376 0
I can confirm that if the zvol is created in the legacy UI and edited in the legacy UI this works properly. If you create in the new UI and try to edit in the old UI you see the bad behavior. I attempted this because trying to edit the zvol size in the new GUI results in a traceback.