How to edit files in the portal CMS ?

[sovattha]

In the AdminCMS portlet, I have plain text files (actually HTML files that have the .xhtml extension) and I would like to edit them such as we already can with .txt files.

I already had a look in the XML files to change the mime types supported but it does not seam to be the right place to modify this...

[sovattha]

That's fine. I modified several files and added an xhtml mime type "text/html" and it does what I want.

I can edit the new files... but not the old ones...