Yes, I think this is the wrong use of the banners. Let's keep a note of this (or file a new Jira issue about this case) and come back to it as an edge case that needs to be addressed when the main (correct) banners have been updated. Thanks.

One example of what is talking about–is it appropriate to have the info icon there, since it's included in the CSS for sak-banner-info?

https://github.com/sakaiproject/sakai/blob/487ada9cf85328a84884beb02c626659fa2b28f8/library/src/morpheus-master/sass/modules/tool/samigo/_samigo.scss#L18
 
This samigo element extends bs-callout-primary (blue banner/box) but standardizing it would mean replacing it with sak-banner-info. Is this a misuse of the bootstrap callout box (is it supposed to have different functionality), or can it be replaced with a Sakai info banner? 
 

 

We’ve got and working on implementing these across the code base.

Per the testing instructions, and I were able to confirm that the blue information banner is displaying in Site Info to instruct maintain/instructor users to visit the Manage Participants tab. The blue "i" icon and blue banner displayed as expected in multiple browsers and platforms. In Chrome, testing for responsiveness for different mobile device sizes also worked.