Refactor section card components

[dcrescimbeni]

User Story As a developer, I want to have a unified, easy-to-use card section card component to avoid having to rewrite code.

Most of our components that are inside cards have the same characteristics:

• A header
  • Most are yellow, but there are some white ones that I'd think weren't modified after the redesign
  • Most headers are just titles, although some contain tabs
  • Some headers contain custom elements, like toggle buttons
• Bordered corners
• A line separating the header and the body
• A dark background
• 24px padding all around

Examples