Changes FEAT: keep global elements when deleting last participant (#2175) FIX: allow undo after deleting last participants and data store (#1676) FIX: allow styling markers with canvas.addMarker and css (#2173) CHORE: render flow markers as part of djs-visual (#2173) DEPS: update to diagram-js@14.7.0 v17.7.1...v17.8.0