Or does have something to do with speed load performance.
Or any other reason

You should never edit the files that come with cmsms or its modules!Whats the purpose, is it only so you can edit the template inside cmsms admin instead of doing it in an external editor.
You can find a very nice technique for this situation herevelden wrote: You should never edit the files that come with cmsms or its modules!
If you do, you can/will be unpleasantly surprised after an upgrade of cmsms...