Inconsistent unit labels in the PVC creation form

[andybraren]

When creating a Persistent Volume Claim, the unit dropdown next to the size field starts as GiB. Interacting with the dropdown changes the unit label from the expected MiB/GiB/TiB to the abbreviated Mi/Gi/Ti instead. Since abbreviated units are used elsewhere in the console, it seems like the elongated labels should be replaced.

[spadgett]

/assign @zherman0

[zherman0]

Opened PR1228 to fix this #1228