Update className for has-csstransform3d tests so it actually works.

The change for issue #313 introduced this bug.
has-css3: Revise transform3d test to always clean up properly
Note has-css3 fix
Allow functions to be used as column sorters
CHANGES.md: Note fix for sort functions
Add Arabic translation for Pagination extension
CHANGES.md: Note added Arabic Pagination nls bundle
Don't throw exception for large select ranges

Selection can't currently handle large selection ranges because it
drops nodes that are far away from the currently visible range. Emit
a warning rather than throwing an exception when this happens.

Fixes #705 (sort of)