Group edit form no longer allows for adding of multiple datasets at once

[rgrp]

Can only add one dataset at a time now (not sure when this broke but was working ~2-3m ago).

Assigning to seanh for review and estimation. I'd rate this as quite annoying but not absolutely critical (hence assigned priority).

[rgrp]

This annoyed me so much I just fixed it:  https://github.com/okfn/ckan/commit/5eca7d5e37c0ef392b768b8b3768b2c3f93448b5

Issue was that our auto-completion depended on structure of the HTML which changes with bootstrapification.

BTW: have deployed this via copy and paste on datahub so i can use it. Will want to revert this when you do a deploy.

@Ross: I note that the same bug probably affects organization auto-complete.