Improve the entire icon logic

- Tree Shaking for Icons (Closes #53)
- New API for the config (See 
https://github.com/uwap/mqtt-control-map/wiki/Icons)
- Icons can now be colored everywhere, not just on the map

package.json

@@ -14,7 +14,7 @@
   "dependencies": {
     "@material-ui/core": "^4.11.0",
     "@material-ui/lab": "^4.0.0-alpha.56",
-    "@mdi/font": "^5.6.55",
+    "@mdi/react": "^1.4.0",
     "leaflet": "^1.5.1",
     "lodash-es": "^4.17.15",
     "mqtt": "^4.2.1",
@@ -31,6 +31,7 @@
     "@babel/preset-env": "^7.5.5",
     "@babel/preset-flow": "^7.0.0-rc.1",
     "@babel/preset-react": "^7.0.0-rc.1",
+    "@mdi/js": "^5.6.55",
     "babel-eslint": "^10.0.2",
     "babel-loader": "^8.0.6",
     "clean-webpack-plugin": "^3.0.0",