Allow frame collections to properly handle selectors
(cherry picked from commit 4c30689)
ensure driver is in desired context to check for stale elements
(cherry picked from commit 6a54162)
Improve stale element handling
(cherry picked from commit 1493742)
Monkey patch to get Window class updates from Selenium 2.45.dev, without performance issues
(cherry picked from commit 2bd1e9a)