Renamed folder name from device-connection to peripheral-connection.

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

...nsions/peripheral-connection/ev3/ev3-hub-illustration.svg

...raries/extensions/peripheral-connection/ev3/ev3-small.svg

.../peripheral-connection/microbit/microbit-illustration.svg

...ensions/peripheral-connection/microbit/microbit-small.svg

...s/peripheral-connection/wedo/wedo-button-illustration.svg

...tensions/peripheral-connection/wedo/wedo-illustration.svg

...ries/extensions/peripheral-connection/wedo/wedo-small.svg