While testing a site with the @gantry 5 template via @google PageSpeed Insights, I found the following errors related to the menu icon - image field.

1. Image elements do not have explicit width and height
   
   images in this field do not have width and height in the code.
   the same error for the Logo (custom image) particle code in my template.
2. Image elements have [alt] attributes that are redundant text.
   
   the image has the same alt text as the menu item (text field).
   I suggest making it possible to specify a different alt text for the menu item icon/image.

Joomla 5.1.4, Gantry 5.5.19