Facia tweaks Tuesday

According to Kat's feedback:
- Properly size meta items on fronts
- Headline of an item with no image in a row of four is bigger on desktop
- Add space between container title and avatar in comment and debate container
- Hide left separators in collections on wide viewport
- Top story standfirst text size is always headline 2

![ ](https://31.media.tumblr.com/fb43a7440cb68effabc1e94e4a6867d2/tumblr_inline_mzodg3sjJW1raprkq.gif)