Reverses 07d3ec468a747f065bd5518896eb5cfd008689f3 where mike mistakenly removed code that is necessary to update jstree icons.
Merge pull request #77 from dimagi/reverse-foo

Reverses vellum/foo
Merge branch 'master' of github.com:dimagi/Vellum into auto-height
Merge branch 'master' of github.com:dimagi/Vellum into vellum-staging
Merge branch 'auto-height' into vellum-staging