Port sync, queue management and notifs.

package.json

@@ -34,6 +34,7 @@
     "@styled-icons/simple-icons": "^10.33.0",
     "@traptitech/markdown-it-katex": "^3.4.3",
     "@traptitech/markdown-it-spoiler": "^1.1.6",
+    "@types/lodash.isequal": "^4.5.5",
     "@types/markdown-it": "^12.0.2",
     "@types/node": "^15.12.4",
     "@types/preact-i18n": "^2.3.0",
@@ -53,6 +54,7 @@
     "highlight.js": "^11.0.1",
     "idb": "^6.1.2",
     "localforage": "^1.9.0",
+    "lodash.isequal": "^4.5.0",
     "markdown-it": "^12.0.6",
     "markdown-it-emoji": "^2.0.0",
     "markdown-it-sub": "^1.0.0",