Bigfile Tablespace datafiles over 1TB, Datafile Size is blank (4275928)

User has a couple of Bigfile tablespaces that are very large (over 1TB).
When altering the Tablespace and trying  to make the maxsize even larger, Toad can’t handle a current size over 1TB.
The Datafile Size is blank.  
One has to change the maxsize in GB which is a pain.
TOAD does not handle Datafile that are 1TB or larger, and therefore cannot populate the Datafile Size.

WORKAROUND:
None

STATUS:
This issue was fixed in Toad 12.0. The latest version of Toad can be downloaded here.