Notification system in frontend

- Heatmap worker now reports progress
- Base for new altitude value
- Phones can be marked active

frontend/package.json

@@ -21,6 +21,11 @@
     "@angular/platform-browser-dynamic": "~10.1.5",
     "@angular/router": "~10.1.5",
     "@angular/service-worker": "~10.1.5",
+    "@fortawesome/angular-fontawesome": "^0.7.0",
+    "@fortawesome/fontawesome-svg-core": "^1.2.28",
+    "@fortawesome/free-brands-svg-icons": "^5.13.0",
+    "@fortawesome/free-regular-svg-icons": "^5.13.0",
+    "@fortawesome/free-solid-svg-icons": "^5.13.0",
     "@types/chart.js": "^2.9.27",
     "@types/mapbox-gl": "^1.12.5",
     "@types/moment": "^2.13.0",