Can you add a setting for thumbnail URL? or is my route config wrong?

[con322]

I have the following route setup in my backend config:

        'routes' => [
            // Base absolute path to web directory
            'baseUrl' => '',
            // Base web directory url
            'basePath' => '@frontend',
            // Path for uploaded files in web directory
            'uploadPath' => 'uploads',
        ],

The files are uploaded to the correct directory however once uploaded the following message is displayed:

{"files":[{"url":"/uploads/2015/12/test.jpg","thumbnailUrl":"/backend/uploads/2015/12/test-128x128.jpg","name":"test.jpg","type":"image/jpeg","size":9713,"deleteUrl":"/backend/filemanager/file/delete?id=2","deleteType":"POST"}]}

As you can see the thumbnail URL has backend at the beginning which isn't necessary.

[fabiomlferreira]

I have fixed this bug that was introduced by a pull request that @PendalF89 accepted.
In the last version this error should be fixed