ScrollableContainer functional test: strongly increase timeouts to help running on sauce
Sauce config: set Chrome version rather than leaving it unspecified, because otherwise it doesn't default to the latest version available on Sauce
ScrollableContainer functional test: some improvements suggested by wkeese
regenerate CSS files according to ibm-js/delite@889605bdd0b73ddf69077ed869212439bfc5ace2
delete intermediate CSS files, refs ibm-js/delite@9dab02a3fcd53574b706103cbbf9c849810307a6