Fix incorrect total size displayed for spreadsheets (#318)

www/common/common-ui-elements.js

@@ -254,15 +254,22 @@ define([
 
         if (common.isLoggedIn() && AppConfig.enablePinning) {
             // check the size of this file...
-            common.getFileSize(data.channel, function (e, bytes) {
-                if (e) {
-                    // there was a problem with the RPC
-                    console.error(e);
-
-                    // but we don't want to break the interface.
-                    // continue as if there was no RPC
-                    return void cb(void 0, $d);
-                }
+            var bytes = 0;
+            NThen(function (waitFor) {
+                var chan = [data.channel];
+                if (data.rtChannel) { chan.push(data.rtChannel); }
+                if (data.lastVersion) { chan.push(Hash.hrefToHexChannelId(data.lastVersion)); }
+                chan.forEach(function (c) {
+                    common.getFileSize(c, waitFor(function (e, _bytes) {
+                        if (e) {
+                            // there was a problem with the RPC
+                            console.error(e);
+                        }
+                        bytes += _bytes;
+                    }));
+                });
+            }).nThen(function () {
+                if (bytes === 0) { return void cb(void 0, $d); }
                 var KB = Util.bytesToKilobytes(bytes);
 
                 var formatted = Messages._getKey('formattedKB', [KB]);