fix: don't parent popup windows on Windows OS (#4181)

Co-authored-by: Felanbird <41973452+Felanbird@users.noreply.github.com>
Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>
fix https://github.com/Chatterino/chatterino2/issues/3863
fix https://github.com/Chatterino/chatterino2/issues/4180

src/singletons/WindowManager.cpp

@@ -262,12 +262,18 @@ Window &WindowManager::createWindow(WindowType type, bool show, QWidget *parent)
             return parent;
         }
 
+        // FIXME: On Windows, parenting popup windows causes unwanted behavior (see
+        //        https://github.com/Chatterino/chatterino2/issues/4179 for discussion). Ideally, we
+        //        would use a different solution rather than relying on OS-specific code but this is
+        //        the low-effort fix for now.
+#ifndef Q_OS_WIN
         if (type == WindowType::Popup)
         {
             // On some window managers, popup windows require a parent to behave correctly. See
             // https://github.com/Chatterino/chatterino2/pull/1843 for additional context.
             return &(this->getMainWindow());
         }
+#endif
 
         // If no parent is set and something other than a popup window is being created, we fall
         // back to the default behavior of no parent.