Press Resources updates

- Add fifth spokesperson and adjust responsive behavior accordingly.
- Increase margin under section headings.

Unrelated:
- Safe-ify post titles in related/popular lists.
Well, to split hairs a little, I wouldn't call it "a modifier having an element", I'd call it "a modified block having an element". But I don't disagree with your broader point. It does get somewhat confusing, that the performance hit by adding a descendant to the selector is probably not significant. I'll make the recommended switch.

I'm not in favor of the `.list__press-links` suggestion, though. I think modifiers should be used more for different styling or states of a block or element rather than organization/namespacing. Coining a new singleton modifier that will never be used anywhere else seems unnecessarily complex.

I _would_ potentially be in favor of giving that list a unique block name, though, like `.press-contacts_general-contacts` It effectively achieves the same thing, but avoids the questionable use of a modifier in this context.