The foobar and modernized themes have 5 icons in .../static/img/admonitions/. Both ReST and Docbook define 9 types of admonitions. We are missing icons for: attention, danger, error, and hint.
When the new icons are added, .../static/css/stylus/admonitions.styl must be updated to point to the new icons.
Related issue 1: The note.png icon is hard to see, needs more contrast.
Related issue 2: We could eliminate duplicate maintenance if these icon and CSS files were in a location that could be shared by all themes.
Related issue 3: The basic theme currently does not have the CSS to display admonitions icons.