The default font size configuration (class based) does not work with supportAllValues

[Reinmar]

📝 Provide detailed reproduction steps (if any)

It's applied as an inline style:

While it should apply a class.

It's a tricky case – some values must apply classes and some should apply inline styles (pasted content). Therefore, we can say that supportAllValues works only with inline value based config. In this case, we need an error thrown when one tries to use supportAllValues without setting available items and we need to cover this in the documentation.

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