id to uuid, import cleanup and folder reorg for devices and prefs 2

src/channels/components/AddChannel/AddChannel.js

src/channels/components/AddChannel/AddChannel.scss

...els/pages/CreateChannelPage.NOT.USED/CreateChannelPage.js

src/devices/actions/devices.js

src/devices/components/AddDevice.js

src/devices/components/AddDevice.scss

src/devices/components/DevicesList.jsx

src/devices/components/SafariRegistration.js

src/devices/components/ServiceWorkerRegistration.js

src/devices/pages/DevicesGlobal.js

src/devices/reducers/devices.js

src/preferences/actions/preferences.js

src/preferences/components/AddPreference.js

src/preferences/components/AddPreferences.scss

src/preferences/components/NoPreferencesWarningBanner.jsx

src/preferences/components/PreferencesList.jsx

src/preferences/reducers/preferences.js