Update meta-boxes.js

Add filter options to product gallery images selector to make visible filters of plugins such as the Enhanced Media Library
Add filter options to product gallery images selector to make visible
filters of plugins such as the Enhanced Media Library
Merge branch 'master' of git@github.com:vrozkovec/woocommerce.git
Check for actions before looping over them
Merge pull request #4470 from vrozkovec/master

Update meta-boxes.js
Merge pull request #4476 from ragulka/check-for-actions

Check for actions before looping over them