ActionReplay: Fix ISOProperties corrupting active code set

ISOProperties loads codes using ActionReplay::LoadCodes which actually applies
the codes to the global state. If a game is running then that games receives
all the codes (and ACTIVE status) from the second game being shown in
ISOProperties which is not desirable.

Source/Core/DolphinWX/ISOProperties.h

@@ -208,6 +208,7 @@ private:
 	void OnComputeMD5Sum(wxCommandEvent& event);
 	void OnShowDefaultConfig(wxCommandEvent& event);
 	void ListSelectionChanged(wxCommandEvent& event);
+	void OnActionReplayCodeChecked(wxCommandEvent& event);
 	void PatchButtonClicked(wxCommandEvent& event);
 	void ActionReplayButtonClicked(wxCommandEvent& event);
 	void RightClickOnBanner(wxMouseEvent& event);