Have the UserIndicatorController use a separate window, switch to using one single instance throughout the application

UnitTests/Sources/CreateRoomViewModelTests.swift

@@ -44,7 +44,7 @@ class CreateRoomScreenViewModelTests: XCTestCase {
                                             createRoomParameters: .init(parameters),
                                             selectedUsers: usersSubject.asCurrentValuePublisher(),
                                             analytics: ServiceLocator.shared.analytics,
-                                            userIndicatorController: nil)
+                                            userIndicatorController: UserIndicatorControllerMock())
         self.viewModel = viewModel
         
         viewModel.actions.sink { [weak self] action in

UnitTests/Sources/StartChatViewModelTests.swift

@@ -39,7 +39,7 @@ class StartChatScreenViewModelTests: XCTestCase {
         viewModel = StartChatScreenViewModel(userSession: userSession,
                                              appSettings: ServiceLocator.shared.settings,
                                              analytics: ServiceLocator.shared.analytics,
-                                             userIndicatorController: nil,
+                                             userIndicatorController: UserIndicatorControllerMock(),
                                              userDiscoveryService: userDiscoveryService)
         
         AppSettings.reset()

UnitTests/Sources/UserIndicatorControllerTests.swift

@@ -25,7 +25,7 @@ class UserIndicatorControllerTests: XCTestCase {
     private var indicatorController: UserIndicatorController!
     
     override func setUp() {
-        indicatorController = UserIndicatorController(rootCoordinator: PlaceholderScreenCoordinator())
+        indicatorController = UserIndicatorController()
     }
     
     func testIndicatorQueueing() {