VE-589: Proof-of-concept hiding of slugs
VE-589: Still proof-of-concept but improved a little bit
VE-589: Add only one slug if there are not any content nodes
VE-589: Cleanup
VE-589: Fix minor JS styling
VE-589: Adjust unit tests so they are passing when we don't have slugs
Merge pull request #3672 from Wikia/VE-589

VE-589