Block links displaying inline in off-canvas list

Attached patch adds UL as a prefix/suffix to the details container and an LI on every link item. Screenshot of the result:

I definitely agree with the need of better templating and markup on the form. I tried to go by step and this is why I introduce a theme function to render the individual block items in the list ( #3349340 ✨ Browser block item displayed via a theme function Fixed ).

Is there a way to use the item_list theme function instead of "hardcoding" the prefix/suffix + the li tag in the template?

I'm not sure, since it is a details type element.

Please find a patch which achieve the exact same thing using item_list theme function.

I think it needs some css styling now.