This will prevent poor behavior in the browsers when it comes to loading indicators.
However devs can still force foreverFrame if they please.
Forced longPolling transport when doing an auto transport and browser…
… is <= ie8
- This also involved moving the ieVersion check into the SignalR
privates and out of the foreverFrame transport specific code.
Minified/compiled forced longPolling for <= ie8 change
Added functional test to verify #1764