ActionReplay: UI Consistency and Cleanup

Cleanup code style.

Move ActionReplay code->INI saving into ActionReplay namespace.

Threadsafety Cleanup: ActionReplay is accessed from the Host, Emu
and CPU Threads so the internal storage needs to be protected by a
lock to prevent vectors/strings being deleted/moved while in use by
the CPU Thread.

UI Consistency: Make ARCodes behave like Gecko Codes - only apply
changes when Apply is pressed. Save changes to INI from CheatsWindow.

ISOProperties/CheatsWindow now synchronize with each other.

Source/Core/DolphinWX/ARCodeAddEdit.cpp

@@ -160,6 +160,7 @@ void CARCodeAddEdit::SaveCheatData(wxCommandEvent& WXUNUSED(event))
 		newCheat.name = WxStrToStr(EditCheatName->GetValue());
 		newCheat.ops = decryptedLines;
 		newCheat.active = true;
+		newCheat.user_defined = true;
 
 		arCodes->push_back(newCheat);
 	}