Improvement: if an activity has no monologo, and you fiddle one in, you want no "nofilter" class for the img.

[lucaboesch]

I'll admit that's an edge case but it is probably going to happen. To reproduce: install a plugin which has no monologo.svg, e.g. https://moodle.org/plugins/mod_capquiz . Optionally, fiddle

        case FEATURE_MOD_PURPOSE:
            return MOD_PURPOSE_ASSESSMENT;

in in the lib.php capquiz_supports function.

Override the icon with the branding possibility, overriding it with the monologo.svg icon from https://github.com/bostelm/moodle-mod_scheduler maybe.

What you expect: A white icon on pink background. What actually happens: A black icon on pink background.