An easy way to add alternative text (alt="") to an image for accessibility

Website accessibility is important to our organization. We try to make sure that all images in our knowledge base have alternative text. This is not only a benefit for users who are unable to visually identify an image but it's also an advantage for SEO.

To add alt text in Zendesk I need to edit the HTML code each time. Please add an easy way to add alternative text without having to go into the HTML editor. Most smart editors provide this functionality. The attached image shows how it is done in WordPress. 

Ideally, the writer should be prompted to add an alternative text.

This feature would be good for the accessibility of each Knowledge base provided by Zendesk. Please add it :)