(Feature Request) Improve font size selection slider

[HumbleDeer]

Describe the issue

When selecting a font size, there's no readout or reference point for the default. There also seem to be too many possible options that don't align to any known pt. size value.

Expected behaviour

A detent in the centre and/or a readout of the current value allows you to set the same value every time you set this value. Restricting the allowed sizes to one of the known pt. size values would arguably increase accuracy of this slider bar.

Actual behaviour

The slider has no detent for the nominal value.

What version of Raptoreum Core are you using?

Windows version, build v2.0.03.01-unk