fix: profile quick access panel

[huyenltnguyen]

Checklist:

• [x] I have read freeCodeCamp's contribution guidelines.
• [x] My pull request has a descriptive title (not a vague title like Update index.md)

This PR: Fixes the following issues in the Profile Quick Access panel:

• Fixes the styles of the bottom 2 buttons so that they match the rest
• Removes background color from the items, so that they don't look contained / packed in a box

Screenshots

Before

Screenshot

After

Screenshot

| Theme | Screenshot | | --- | --- | | Day | | | Dark | | | Dawn | |