WS2-1635: Fix hero bottom margin on tablets and higher

[bebaps]

Description

Heroes have a 40px bottom margin, causing blocks beneath them to have odd spacing above them when sites are creates using WS2. The margin should only be applied on mobile devices. This PR ensures the margin only applies to screens less than 768px. Also, this PR addresses heroes that are on Degree related pages, as those heroes do not use the CTA buttons at all.

Links

• JIRA ticket

Checklist

• [x] Unity project successfully builds from root yarn install & yarn build
• [x] Commits do not contain multiple scopes
• [x] No new console errors

Browsers

• [x] Chrome
• [x] Safari
• [x] Firefox