Really make sure that you can focus the input fields

Without this, the field will always focus the first input independent of the one actually selected. I first thought that this is related to the usage of empty labels but it's not.

This doesn't solve the source of the problem, but at least it makes the field usable again.
Markup validity

This finally really fixes the focus issue of the field. The problem were incorrectly nested labels.
Merge branch 'integration' of github.com:hananils/field_metakeys into integration

Conflicts:
	assets/field_metakeys.publish.js
Merge pull request #19 from hananils/integration

Really make sure that you can focus the input fields