Update the dashboard user interface to match the database properties

[mojtabakaviani]

The database properties page UI is cleaner and more modern, better aligned with VS Code. Please update the Dashboard UI by adjusting the background and removing shadows.

[erdemtuna]

Thanks for the suggestion, mojtaba kaviani (@mojtabakaviani)! We'd like to make sure we adjust the right surfaces.
Could you share a couple of screenshots to pin this down?