disable fluid font sizes

[snoop23]

Hi there,

I love the new block editor, but I think there should be an option to disable the fluid font sizes, if desired.

The reasons are as follows:

• The fonts often end up looking way too small on mobile.
• many plugins serve fixed font sizes which can't even be changed with custom CSS across all devices, unless one is a pro coder.
• not all websites look great with fluid font sizes. in fact, I'd personally never use it for anything built.

Let me know your thoughts!

Thanks!