permanently deleting a trashed session doesn't update recycle bin list immediately

[carmichaelong]

1. trash a session
2. go to recycle bin
3. permanently delete the session
4. (the session will still show up in the recycle bin)
5. refreshing the page will show that the session was removed permanently successfully in step 3

[nickbianco]

@AlbertoCasasOrtiz can you sort this issue on the sprint board?