Added UI LineGraph

src/mol-geo/geometry/direct-volume/direct-volume.ts

src/mol-geo/geometry/direct-volume/transfer-function.ts

src/mol-plugin/skin/base/components/canvas.scss

src/mol-plugin/skin/base/ui.scss

src/mol-plugin/state.ts

src/mol-plugin/ui/controls/Canvas/CanvasComponent.tsx

src/mol-plugin/ui/controls/Canvas/PointComponent.tsx

src/mol-plugin/ui/controls/parameters.tsx

src/mol-plugin/ui/state.tsx