Grid system v4.0.1


I've been messing around with the grid system in cs-cart 4 and tried to change it from 16 to 12 grids. It seem's that even though in layout design → layouts → edit layout I change value from 16 to 12 and though I change the sizes of all the containers from 16 to 12 it still's takes data from design\themes\basic\css\lib\bootstrap\bootstrap_grid_16.min.css instead of design\themes\basic\css\lib\bootstrap\bootstrap_grid_12.min.css

Could anyone confirm if it's a bug or give an advice how to change the grid system from 16 to 12?