Fix missing alt tag and additional attributes

[nickvergessen]

Error: Attribute notification_id not allowed on element [li](https://html.spec.whatwg.org/multipage/#the-li-element) at this point.
Error: Attribute object_type not allowed on element [li](https://html.spec.whatwg.org/multipage/#the-li-element) at this point.
Error: Attribute object_id not allowed on element [li](https://html.spec.whatwg.org/multipage/#the-li-element) at this point.
Error: An img element must have an alt attribute, except under certain conditions. For details, consult [guidance on providing text alternatives for images](https://www.w3.org/WAI/tutorials/images/).