Small fix

I think Slider::font is not used.

Beside this, there is currently no way to change the font size of a slider’s text box (I’ve overloaded LookAndFeel::createSliderTextBox and changed the font there, but it’s doesn’t work).

Hmm, you’re right, that member must have been left over from some ancient code.

Are you sure you’re changing the font correctly? It’s just a label, there’s no reason it’d ignore the font that you set…