Codeblock uses OS/browser default dropdown, not built in menus

[tommerty]

Is your feature request related to a problem? Please describe.
The dropdown for selecting a language in the codeblock does not use the built in theming/dropdown, but uses the OS or browser default (not entirely 100% on this).

This leads to an inability to style this further, and an inconsistent UI depending on the device.

Chrome on Mac:

Firefox in Windows:

Describe the solution you'd like
Would be great to utilize the same dropdown systems as the formatter, handle

Additional context
Posted this on the Discord to which Yousef recommended the issue 🎉

Bonus
[ ] I'm a sponsor and would appreciate if you could look into this sooner than later 💖

[tommerty]

Seems there's already a PR: #1219