set desktop-entry hint with libnotify (#6615)

Reviewed-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/singletons/Toasts.cpp

@@ -346,7 +346,7 @@ void Toasts::ensureInitialized()
     {
         return;
     }
-    auto result = notify_init("chatterino2");
+    auto result = notify_init("Chatterino");
 
     if (result == 0)
     {
@@ -367,6 +367,10 @@ void Toasts::sendLibnotify(const QString &channelName,
     NotifyNotification *notif = notify_notification_new(
         str.toUtf8().constData(), channelTitle.toUtf8().constData(), nullptr);
 
+    notify_notification_set_hint(
+        notif, "desktop-entry",
+        g_variant_new_string("com.chatterino.chatterino"));
+
     // this will be freed in onNotificationDestroyed
     auto *channelNameHeap = new QString(channelName);