fix(settings): changing language sets title to "Add Friend"

This fixes issue #3708.
Changing language sets title of settings widget to "Settings" instead
of wrong "Add Friend".

src/widget/widget.cpp

@@ -2318,8 +2318,9 @@ void Widget::retranslateUi()
     actionQuit->setText(tr("Exit", "Tray action menu to exit tox"));
     actionShow->setText(tr("Show", "Tray action menu to show qTox window"));
 
-    if (!Settings::getInstance().getSeparateWindow())
-        setWindowTitle(fromDialogType(DialogType::AddDialog));
+    if (!Settings::getInstance().getSeparateWindow() && (settingsWidget && settingsWidget->isShown())) {
+        setWindowTitle(fromDialogType(DialogType::SettingDialog));
+    }
 
     friendRequestsUpdate();
     groupInvitesUpdate();