Apply props-passing pattern to all components

src/components/blocks.js

src/components/green-flag.js

src/components/gui.js

src/components/sprite-selector.js

src/components/stage.js

src/components/stop-all.js

src/containers/blocks.js

src/containers/green-flag.js

src/containers/sprite-selector.js

src/containers/stage.js

src/containers/stop-all.js