add some help window

client/package.json

 {
   "name": "spot-web-app",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "homepage": "http://spot.lrde.epita.fr/app/",
   "private": true,
   "license": "GPL-3.0",
   "dependencies": {
-    "@material-ui/core": "^3.1.2",
-    "react": "^16.5.2",
-    "react-dom": "^16.5.2",
+    "@material-ui/core": "^3.9.2",
+    "@material-ui/icons": "^3.0.2",
+    "react": "^16.8.4",
+    "react-dom": "^16.8.4",
     "react-scripts": "2.0.3",
     "react-svg-inline": "^2.1.1",
     "typeface-roboto": "0.0.54"