[sldev] Snowglobe - Corrupt texture on animation preview model

[Stickman]

Just made a new Jira:

http://jira.secondlife.com/browse/VWR-13803

It appears pinning the upload menu (File -> Upload -> "double bars" at
the top) and snapping it to the upper left corner of the window will
make the animation preview avatar sport a non-grey texture of some
kind. 1.23RC2 doesn't seem to have this issue.

Doesn't seem serious, but I figured I'd bring it up in case it's
indicative of something larger and less visible.

-Stickman