The ScrollPane does not update it's ScrollBars when it's contents are
resized by a Scale transform.
. The scrollbar thumb size is not updated if the contents of a ScrollPane are resized,
. The requirement for scrollbars is not checked, so they don't appear as-needed.
Use the Slider in the attached testcase to verify.
The contents are scaled, but the thumb isn't resized and the need for the scrollbar can be wrong.