tweak template file picker for images to see jpeg extensions

The file picker in the facts template that allows the user to select local images correctly allows the user to view and select files with extension .jpg. However, it does not allow the user to select files with the extension .jpeg.  This is a nuisance as many image files come with .jpeg rather than .jpg, which means that to use the file picker,  I need to go and change the extension for each file from jpeg to jpg.