Flash messages understand type: 'danger', 'warning', 'information', and 'success'.

Banners passed in directly from configuration only send messages and are always presented as 'warning' (the default). More often than not, these banners should be informational (see the top of the history records index for an example). 

Ensure that $banners can pass along their type to the notify/alert element. While there, also remove the redundant notify/banner element and replace its usage (one use in API Users).