canvas3d: custom pixel-scale & viewport

src/apps/viewer/index.ts

src/mol-canvas3d/camera.ts

src/mol-canvas3d/canvas3d.ts

src/mol-canvas3d/controls/object.ts

src/mol-canvas3d/controls/trackball.ts

src/mol-canvas3d/passes/draw.ts

src/mol-canvas3d/passes/multi-sample.ts

src/mol-canvas3d/passes/pick.ts

src/mol-canvas3d/passes/postprocessing.ts

src/mol-canvas3d/util.ts

src/mol-gl/compute/util.ts

src/mol-gl/renderer.ts

src/mol-gl/shader/compose.frag.ts

src/mol-gl/shader/postprocessing.frag.ts

src/mol-gl/webgl/context.ts

src/mol-plugin-ui/viewport/canvas.tsx

src/mol-plugin/config.ts

src/mol-plugin/context.ts

src/mol-util/input/input-observer.ts