When there's a featured image, output only that for both Twitter and FB, ignore other images in post (functionality change)
Rework logic for showing networks on Social tab (UX change): social network no longer shows on social tabs if not enabled in admin
Add Twitter inputs to the Social tab
Always output a specific Twitter title and description, as otherwise we can't overwrite them from metabox
Merge pull request #1761 from Yoast/og-image-logic

Major changes to Social network logic