FIX: Tour (newer bootstrap version) did not allow HTML in popover.

src/core/js/tour.js

@@ -630,6 +630,7 @@ var tour = new function() {
                 content: markdown_content,
                 placement: placement,
                 html: true,
+                sanitize: false,
                 trigger: 'manual',
                 template: popover_template,
             });