Make batch-edit more accessible

# Last Call for Pull Requests!
This updates the batch-edit form to look at little nicer and work better with screen readers.

:bell: :bell: :bell: :bell: :bell: 

Once this PR is merged, we're clear to release 4.0 formally, unless anyone wants to add anything else.

:mega: @mjgiarlo @jcoyne @cam156 @bmaddy @hectorcorrea @mtribone 
use `expect(...).to eq` on these changes.