Fix special readonly behavior for files inside vfs roots

package.json

@@ -56,7 +56,7 @@
         "c9"
     ],
     "c9plugins": {
-        "c9.ide.language": "#9e8f935469",
+        "c9.ide.language": "#fad749945b",
         "c9.ide.language.css": "#be07d72209",
         "c9.ide.language.generic": "#a4023db7f6",
         "c9.ide.language.html": "#22fdc74869",