Started updating Bootstrap to v4

package.json

@@ -71,7 +71,7 @@
   "dependencies": {
     "babel-polyfill": "^6.26.0",
     "bignumber.js": "^6.0.0",
-    "bootstrap": "^3.3.7",
+    "bootstrap": "^4.0.0",
     "bootstrap-colorpicker": "^2.5.2",
     "bootstrap-switch": "^3.3.4",
     "crypto-api": "^0.8.0",
@@ -98,6 +98,7 @@
     "node-md6": "^0.1.0",
     "nwmatcher": "^1.4.3",
     "otp": "^0.1.3",
+    "popper.js": "^1.12.9",
     "sladex-blowfish": "^0.8.1",
     "sortablejs": "^1.7.0",
     "split.js": "^1.3.5",