Added todos.

Signed-off-by: SeynovAM <sejnovalexey@gmail.com>
Fixed default value of FileSystemStorage::$maxLength.

Signed-off-by: SeynovAM <sejnovalexey@gmail.com>
Added backgroundColor param for thumbnails.

Signed-off-by: SeynovAM <sejnovalexey@gmail.com>
Added non-jQuery logic for FormEnctypeTrait.

Signed-off-by: SeynovAM <sejnovalexey@gmail.com>