DolphinWX: Show the required IOS version in info panel

This is useful to know which IOS version is required by a title without
having to look at the TMD manually.

The IOS version row will only appear if there is a TMD, of course.

Source/Core/DolphinWX/ISOProperties/InfoPanel.h

@@ -62,6 +62,7 @@ private:
   wxTextCtrl* m_revision;
   wxTextCtrl* m_date;
   wxTextCtrl* m_fst;
+  wxTextCtrl* m_ios_version = nullptr;
   wxTextCtrl* m_md5_sum;
   wxButton* m_md5_sum_compute;
   wxChoice* m_languages;