Allow to use negative quantities in stacked bars
Allow to use negative quantities in stacked bars

grafiti-io/SwiftCharts,beneiltis/SwiftCharts,creister/SwiftCharts,petester42/SwiftCharts,grafiti-io/SwiftCharts,petester42/SwiftCharts,liuxuan30/SwiftCharts,RobotsAndPencils/SwiftCharts,beneiltis/SwiftCharts,datomnurdin/SwiftCharts,creisterer-db/SwiftCharts,RobotsAndPencils/SwiftCharts,beneiltis/SwiftCharts,i-schuetz/SwiftCharts,nanthi1990/SwiftCharts,liuxuan30/SwiftCharts,i-schuetz/SwiftCharts,petester42/SwiftCharts,mchirico/SwiftCharts,i-schuetz/SwiftCharts,grafiti-io/SwiftCharts,mchirico/SwiftCharts,nanthi1990/SwiftCharts,creister/SwiftCharts,liuxuan30/SwiftCharts,creisterer-db/SwiftCharts,RobotsAndPencils/SwiftCharts,ramoslin02/SwiftCharts,nanthi1990/SwiftCharts,mchirico/SwiftCharts,creister/SwiftCharts,datomnurdin/SwiftCharts,ramoslin02/SwiftCharts,creisterer-db/SwiftCharts,beneiltis/SwiftCharts,ramoslin02/SwiftCharts,nanthi1990/SwiftCharts,datomnurdin/SwiftCharts