Minor bug fixes: IE8 polls and Survey Export

Just a quick note on a couple of fixes that we deployed today. For some users the CSV export for surveys was very slow, especially when there were a lot of responses in the survey. This should now be running super fast. Also a number of users complained that some polls were not working correctly in IE8. We have fixed this issue now and will be applying it to all polls throughout the day. It only affected older polls on the system so if it is happening to any of your polls you can easily fix it but editing and re-saving the poll.