Preferences page rehaul: use React components, UI improvements

package.json

@@ -18,6 +18,7 @@
     "application-config": "^1.0.0",
     "bitfield": "^1.0.2",
     "chromecasts": "^1.8.0",
+    "classnames": "^2.2.5",
     "create-torrent": "^3.24.5",
     "deep-equal": "^1.0.1",
     "dlnacasts": "^0.1.0",
@@ -47,6 +48,8 @@
   "devDependencies": {
     "babel-cli": "^6.11.4",
     "babel-plugin-syntax-jsx": "^6.13.0",
+    "babel-plugin-transform-es2015-destructuring": "^6.9.0",
+    "babel-plugin-transform-object-rest-spread": "^6.8.0",
     "babel-plugin-transform-react-jsx": "^6.8.0",
     "cross-zip": "^2.0.1",
     "electron-osx-sign": "^0.3.0",