By default, GeneratePress will now combine unsemantic-grid.css, style.css and mobile.css into one file. This results in fewer HTTP requests.
Existing sites will turn this option off by default to prevent any potential conflicts.
When combined, GeneratePress will use a slimmed down version of unsemantic-grid.css, which only includes the classes that are needed by the theme to function.
This option is unavailable for Flexbox version of the theme.