Merge pull request #2662 from paulkaplan/add-ev3-connection-message

src/components/connection-modal/connecting-step.jsx

src/components/connection-modal/connection-modal.css

src/components/connection-modal/connection-modal.jsx

src/components/connection-modal/error-step.jsx

src/components/connection-modal/icons/bluetooth.svg

src/components/connection-modal/icons/scratch-link.png

src/components/connection-modal/icons/scratchlink.svg

src/components/connection-modal/unavailable-step.jsx

src/components/modal/modal.css

src/components/modal/modal.jsx

src/containers/blocks.jsx

src/containers/connection-modal.jsx

src/lib/assets/icon--help.svg

src/lib/libraries/extensions/index.jsx