I'm still here to bore you.

I'm working with a set of template files for reknown Smarty Template Engine.
All these files has an ugly .template extension and I can't changeing it.
Well, in the Project Management pane in the file explorer it seems to be NO WAY to have these files listed. I think this pane filter file list by extension because jpg, gif and css files are all there. Only .template do not appear.
I've already added .template extension to managed extensions, to Popular HTML list and virtually everywhere it made sense to me, but no way to see them or to set Project pane filter property it seems.
Any help?
Thank you, as everytime!