Fix for issue #1931: looping video on thumbnail click

Fix for issue #1931: looping video on thumbnail click - a timing issue
- the pause plus moving the play into the handle event seems to fix
this. Not sure that the selectSlide in the onclick is necessary either
as it is called in the handle event but didn't want to change that
Pull from Master

Pull from Master
Merge branch 'master' of https://github.com/Stanford-Online/class2go
Remove Stanford Online in registration emails

Replace with site_name
Merge pull request #2405 from dglance/dglance-emailfix

Dglance emailfix for issue #2294