Revert "fix: inlines could be dragged outside the table"

ugh, this version of jquery-ui is too buggy. containment didn't always
work.

This reverts commit ab0f34b225d27e52b3e977c8df466694d58c0ade.

Conflicts:

	pops/static/pops/js/pops.inlineFormSet.js
remove css that hid the order field

we shouldn't be hiding things, especially when sortable can't be
trusted.