fix: close logging-channels when closing channels (#5592)

Co-authored-by: kornes <28986062+kornes@users.noreply.github.com>
Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/common/Channel.cpp

@@ -38,6 +38,11 @@ Channel::Channel(const QString &name, Type type)
 
 Channel::~Channel()
 {
+    auto *app = tryGetApp();
+    if (app)
+    {
+        app->getChatLogger()->closeChannel(this->name_, this->platform_);
+    }
     this->destroyed.invoke();
 }