Add MobX for state management

package-lock.json

@@ -7960,8 +7960,7 @@
     "hoist-non-react-statics": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/hoist-non-react-statics/-/hoist-non-react-statics-2.5.0.tgz",
-      "integrity": "sha512-6Bl6XsDT1ntE0lHbIhr4Kp2PGcleGZ66qu5Jqk8lc0Xc/IeG6gVLmwUGs/K0Us+L8VWoKgj0uWdPMataOsm31w==",
-      "dev": true
+      "integrity": "sha512-6Bl6XsDT1ntE0lHbIhr4Kp2PGcleGZ66qu5Jqk8lc0Xc/IeG6gVLmwUGs/K0Us+L8VWoKgj0uWdPMataOsm31w=="
     },
     "home-or-tmp": {
       "version": "2.0.0",
@@ -12224,6 +12223,20 @@
         "minimist": "0.0.8"
       }
     },
+    "mobx": {
+      "version": "5.0.3",
+      "resolved": "https://registry.npmjs.org/mobx/-/mobx-5.0.3.tgz",
+      "integrity": "sha1-U7l/Kg+bDdd3TJYkn4G/LVE9jhw="
+    },
+    "mobx-react": {
+      "version": "5.2.3",
+      "resolved": "https://registry.npmjs.org/mobx-react/-/mobx-react-5.2.3.tgz",
+      "integrity": "sha512-OuSlF2nJEa1PGookZcZnINbvEK4iWNNYiqUh6aebk2AkWxj3sG8OafDOQMcMYApQALTHRsrBIjOx/K8TFxcz7w==",
+      "requires": {
+        "hoist-non-react-statics": "^2.5.0",
+        "react-lifecycles-compat": "^3.0.2"
+      }
+    },
     "moment": {
       "version": "2.22.2",
       "resolved": "https://registry.npmjs.org/moment/-/moment-2.22.2.tgz",
@@ -15694,6 +15707,11 @@
         }
       }
     },
+    "react-lifecycles-compat": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/react-lifecycles-compat/-/react-lifecycles-compat-3.0.4.tgz",
+      "integrity": "sha512-fBASbA6LnOU9dOU2eW7aQ8xmYBSXUIWr+UmF9b1efZBazGNO+rcXT/icdKnYm2pTwcRylVUYwW7H1PHfLekVzA=="
+    },
     "read-all-stream": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/read-all-stream/-/read-all-stream-3.1.0.tgz",