[BEEEP] Firefox Private Mode (#2294)

* Create background in popup if private mode, remove gates

* Add messaging support to runtime in private mode

* Fix messaging services and general bootstrap logic

* Add private mode warning, remove old component

* Deprecate launchGuardService

* Require in memory account for user to be considered authenticated

* Don't change icon for private mode windows

* Set all icons from background page

src/popup/components/private-mode-warning.component.ts

@@ -0,0 +1,16 @@
+import { Component, OnInit } from "@angular/core";
+import { PopupUtilsService } from "../services/popup-utils.service";
+
+@Component({
+  selector: "app-private-mode-warning",
+  templateUrl: "private-mode-warning.component.html",
+})
+export class PrivateModeWarningComponent implements OnInit {
+  showWarning = false;
+
+  constructor(private popupUtilsService: PopupUtilsService) {}
+
+  ngOnInit() {
+    this.showWarning = this.popupUtilsService.inPrivateMode();
+  }
+}