4.30.116-beta: Fixed file uploading

• Fixed error Undefined index: header (View: ...\resources\views\default\form\panel.blade.php)
• Fixed file uploading
• Separate images storage path and files storage path.

 /*
    |--------------------------------------------------------------------------
    |  Directory to upload images to (relative to public directory)
    |--------------------------------------------------------------------------
    */

    'imagesUploadDirectory' => 'images/uploads',

    /*
    |--------------------------------------------------------------------------
    |  Directory to upload files to (relative to public directory)
    |--------------------------------------------------------------------------
    */

    'filesUploadDirectory' => 'files/uploads',

• issue #85
• issue #81
• issue #75