Remove extraneous comment on tests
Refactor controllers to use cancan to load spaces and restrict access to disabled ones
Copy paste field, with modal using only javascript

Using the new helper function copyable_field
Merge remote-tracking branch 'origin/branch-v2-copy-paste' into branch-v2

Conflicts:
	app/views/spaces/_latest_users.html.haml
A few improvements and cleanup in the copy-to-clipboard modal

All small changes, mostly to make it look a bit nicer.