Reload notifications tray when the window regain the focus

https://app.fizzy.do/5986089/cards/2743

It includes a debounce interval to avoid too many of these.

app/javascript/controllers/frame_reloader_controller.js

@@ -0,0 +1,21 @@
+import { Controller } from "@hotwired/stimulus"
+
+export default class extends Controller {
+  static values = {
+    reloadInterval: { type: Number, default: 10 * 60 } // 10 minutes
+  }
+
+  connect() {
+    this.freshSince = Date.now()
+  }
+
+  reload() {
+    const now = Date.now()
+    const reloadIntervalMs = this.reloadIntervalValue * 1000
+
+    if ((now - this.freshSince) >= reloadIntervalMs) {
+      this.freshSince = now
+      this.element.reload()
+    }
+  }
+}