Feature/1219 error notif recipient

Now the drop-down shows the correct value when you click edit. There's still one thing missing: if chatter group was the stored value, the typeahead box is not automatically shown. (But I took this over yesterday afternoon thinking it'd be a quick fix, and I've already spent way too much time. Also, the Force.com IDE has lost my latest changes. So I'm declaring this done.) 

# Warning

# Info

# Issues
Fixes #1219.