Update online after the window active status.

I hope this fixes #26059.

Telegram/SourceFiles/mainwindow.cpp

@@ -115,16 +115,7 @@ MainWindow::MainWindow(not_null<Window::Controller*> controller)
 
 void MainWindow::initHook() {
 	Platform::MainWindow::initHook();
-
 	QCoreApplication::instance()->installEventFilter(this);
-
-	// Non-queued activeChanged handlers must use QtSignalProducer.
-	connect(
-		windowHandle(),
-		&QWindow::activeChanged,
-		this,
-		[=] { checkActivation(); },
-		Qt::QueuedConnection);
 }
 
 void MainWindow::applyInitialWorkMode() {

Telegram/SourceFiles/mainwindow.h

@@ -60,7 +60,7 @@ public:
 
 	MainWidget *sessionContent() const;
 
-	void checkActivation();
+	void checkActivation() override;
 	[[nodiscard]] bool markingAsRead() const;
 
 	bool takeThirdSectionFromLayer();

Telegram/SourceFiles/window/main_window.cpp

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "window/main_window.h"
 
+#include "api/api_updates.h"
 #include "storage/localstorage.h"
 #include "platform/platform_specific.h"
 #include "ui/platform/ui_platform_window.h"
@@ -512,9 +513,13 @@ void MainWindow::handleStateChanged(Qt::WindowState state) {
 }
 
 void MainWindow::handleActiveChanged() {
+	checkActivation();
 	if (isActiveWindow()) {
 		Core::App().windowActivated(&controller());
 	}
+	if (const auto controller = sessionController()) {
+		controller->session().updates().updateOnline();
+	}
 }
 
 void MainWindow::handleVisibleChanged(bool visible) {

Telegram/SourceFiles/window/main_window.h

@@ -148,6 +148,8 @@ protected:
 	void handleActiveChanged();
 	void handleVisibleChanged(bool visible);
 
+	virtual void checkActivation() {
+	}
 	virtual void initHook() {
 	}