Fix downloading picture with different formats

How to reproduce

• go to JSF ui
• inside a folder drag and drop a picture file(.jpg; .png; etc)
• picture file is created
• download the file with the same original size
• file is correctly downloaded
• download the file using one of the other formats
• a file .null is downloaded - Bug

workaround: if you rename the .null file to the normal format (.jpg;.png; etc) the file opens with the new size/format

 

>> Link to an example file in JSF