UI: Fix locale text for "OK" in question dialogs

This is the only case where the button's name does not match the
locale's text, the button name being "Ok" and the locale text item being
"OK", fully capitalized.

UI/qt-wrappers.cpp

@@ -55,10 +55,11 @@ QMessageBox::StandardButton OBSMessageBox::question(
 			title, text, buttons,
 			parent);
 	mb.setDefaultButton(defaultButton);
+	if (buttons & QMessageBox::Ok) \
+		mb.setButtonText(QMessageBox::Ok, QTStr("OK"));
 #define translate_button(x) \
 	if (buttons & QMessageBox::x) \
 		mb.setButtonText(QMessageBox::x, QTStr(#x));
-	translate_button(Ok);
 	translate_button(Open);
 	translate_button(Save);
 	translate_button(Cancel);