Provide a way to set the size of the font

[bertbarabas]

Enable size="n" like for other widgets.

Font size appears to be specified in the theme so an alternative would be to allow developers to set the entire theme or to override an element of an existing theme.

Setting the theme would be a lot more flexible than just setting the size attribute as it would allow a developer to customize the entire look of the grid. On the other hand providing a size attribute is more in line with how other reflex widgets work.

[linear]

ENG-4011 Provide a way to set the size of the font