Usercards no longer close when the originating window (e.g. a search popup) is closed (#3518)

Fixed being unable to open a usercard from inside a usercard while "Automatically close user popup when it loses focus" was enabled

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

src/widgets/helper/ChannelView.cpp

@@ -2060,12 +2060,8 @@ void ChannelView::hideEvent(QHideEvent *)
 
 void ChannelView::showUserInfoPopup(const QString &userName)
 {
-    QWidget *userCardParent = this;
-#ifdef Q_OS_MACOS
-    // Order of closing/opening/killing widgets when the "Automatically close user info popups" setting is enabled is special on macOS, so user info popups should always use the main window as its parent
-    userCardParent =
+    QWidget *userCardParent =
         static_cast<QWidget *>(&(getApp()->windows->getMainWindow()));
-#endif
     auto *userPopup =
         new UserInfoPopup(getSettings()->autoCloseUserPopup, userCardParent);
     userPopup->setData(userName, this->hasSourceChannel()