Merge pull request #4524 from TomMalbran/tom/issue-4409

Issue #4409: Incorrect sort order for untitled files

Author: RaymondLim

src/file/FileUtils.js

@@ -416,14 +416,14 @@ define(function (require, exports, module) {
     function compareFilenames(filename1, filename2, extFirst) {
         var ext1   = getFilenameExtension(filename1),
             ext2   = getFilenameExtension(filename2),
-            cmpExt = ext1.toLocaleLowerCase().localeCompare(ext2.toLocaleLowerCase()),
+            cmpExt = ext1.toLocaleLowerCase().localeCompare(ext2.toLocaleLowerCase(), undefined, {numeric: true}),
             cmpNames;
 
         if (brackets.platform === "win") {
             filename1 = _getFilenameWithoutExtension(filename1);
             filename2 = _getFilenameWithoutExtension(filename2);
         }
-        cmpNames = filename1.toLocaleLowerCase().localeCompare(filename2.toLocaleLowerCase());
+        cmpNames = filename1.toLocaleLowerCase().localeCompare(filename2.toLocaleLowerCase(), undefined, {numeric: true});
 
         return extFirst ? (cmpExt || cmpNames) : (cmpNames || cmpExt);
     }