Ensure Windows 98 Style Consistency

[AkshayKalose]

Currently, the dropdown menus are in the style of Windows XP and not Windows 98. Make sure the style matches.

Examples of what it should look like:

• https://nielssp.github.io/classic-stylesheets/?theme=win9x&skin=98
• https://os-gui.js.org/

Ideally, it can just be done with a few CSS overrides, without having to use or import another library.