Add file type in the pad attributes for existing files

www/common/sframe-common.js

@@ -190,6 +190,7 @@ define([
         });
     };
     funcs.setPadAttribute = function (key, value, cb) {
+        cb = cb || $.noop;
         ctx.sframeChan.query('Q_SET_PAD_ATTRIBUTE', {
             key: key,
             value: value

www/file/inner.js

@@ -94,6 +94,8 @@ define([
                 Title.updateTitle(title || Title.defaultTitle);
                 toolbar.addElement(['pageTitle'], {pageTitle: title});
 
+                common.setPadAttribute('fileType', metadata.type);
+
                 var displayFile = function (ev, sizeMb, CB) {
                     var called_back;
                     var cb = function (e) {