Resolve "Wrap all cards in border"

What does this MR do and why?

• Wraps all widgets on the homepage in cards
• Removes gray background from ToDO items

References

Wrap all cards in border (#561075 - closed)

Screenshots or screen recordings

Before	After

How to set up and validate locally

• Enable the personal_homepage feature flag.
• Go to http://gdk.test:3000/dashboard/home

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #561075 (closed)