Updated mixins.less for building styles
Updated mixins.less for building styles

nextras/datagrid,HotelQuickly/datagrid,bckp/datagrid,AppsDevTeam/datagrid,AppsDevTeam/datagrid,bckp/datagrid,nextras/datagrid,HotelQuickly/datagrid,AppsDevTeam/datagrid,HotelQuickly/datagrid,bckp/datagrid