webdriver: update to latest source.

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9436 5f5364db-9458-4db8-a492-e30667be6df6
webdriver: cleanup

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9437 5f5364db-9458-4db8-a492-e30667be6df6
fix click propagation for IE11

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@9438 5f5364db-9458-4db8-a492-e30667be6df6